spaceflight (33)

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Image Source: Space Billionaires, Please Read the Room, Shannon Stirone, The Atlantic

 

Topics: Civics, Civil Rights, Existentialism, Human Rights, Spaceflight

 

Note: The post title is sourced from The Atlantic article, as is the lurid artwork.

 

It is the experience of seeing firsthand the reality of the Earth in space, which is immediately understood to be a tiny, fragile ball of life, "hanging in the void," shielded and nourished by a paper-thin atmosphere. From space, national boundaries vanish, the conflicts that divide people become less important, and the need to create a planetary society with the united will to protect this "pale blue dot" becomes both obvious and imperative.

 

The thing that really surprised me was that it [Earth] projected an air of fragility. And why, I don’t know. I don’t know to this day. I had a feeling it’s tiny, it’s shiny, it’s beautiful, it’s home, and it’s fragile. Michael Collins, Apollo 11. Source: Wikipedia/Overview effect

 

The best case for taxing the rich is made by a "space race" with billionaires leaving the Earth ravaged by a once-in-a-century pandemic in the form now of the Delta variant, climate change disasters that can't be gaslighted, and modern-day Hooverville tent cities IN the richest nation in the world, exacerbated since last year by the Coronavirus. Almost all new cases in what amounts to a fourth wave are among the unvaccinated, in a bizarre, nihilistic viral analog of the Cold War doctrine of Mutually Assured Destruction, and Dr. Strangelove. But: "space, the final frontier" for billionaires, apparently is more important. Is it my observation only that each "spaceship" looks like a phallic symbol or pleasure instrument?

 

Bezos, of course, ruins the whole point of the Overview effect: “We need to take all heavy industry, all polluting industry, and move it into space and keep Earth as this beautiful gem of a planet that it is,” he said in an interview with NBC News. “That’s going to take decades to achieve, but you have to start. And big things start with small steps.” (Justine Calma, The Verge). That's a direct quote from the richest man in the world, a toss-up clone between either Dr. Evil or Lex Luthor.

 

The world's richest man has obviously not heard about space junk sipping lattes on his half-billion-dollar yacht, with a spare for the helicopter (hey, that's important). Just like Musk's "genius" idea of terraforming the planet Mars for humans by dropping nuclear bombs to warm it up. First point: Mars has no atmosphere to warm up. Second point: Plutonium-239 used in current thermonuclear devices has a half-life of 24,110 years, meaning the radiation level will be half as lethal in 964 human generations. Branson's price tag to do weightlessness is $250,000. You can afford it by entering a contest: the cost is $10, $25, $50, $100, which begs why anyone has to donate to a raffle for a ride with a billionaire? Batman didn't charge the Justice League for the Watchtower (I don't think). Bruce Wayne is a plucky superhero (or antihero); he's fictional.

 

Bezos, Branson, Musk, et al. are real, and they don't appear interested in anything other than their own enjoyment.

 

*****

 

Tuesday, July 30, 2024

 

  • Lauren writes about an astronaut who died on the latest Mars mission. People in the neighborhood say traveling to Mars is a waste of money when people on earth can't afford basic necessities.
  • Lauren also writes about the cost of water increasing. It's fashionable to be dirty since no one can afford to clean their clothes.

 

Shmoop.com: Study Guide, Parable of the Sower, Octavia E. Butler, Chapter 3

 

Rockets, moon shots
Spend it on the have nots
Money, we make it
Fore we see it you take it

 

Oh, make me want to holler
The way they do my life (yeah)
Make me want to holler
The way they do my life

 

This ain't livin', this ain't livin'
No, no baby, this ain't livin'
No, no, no, no

 

"Inner City Blues: Make Me Wanna Holler," Marvin Gaye, Genius Lyrics

 

A rat done bit my sister Nell.
(with Whitey on the moon)
Her face and arms began to swell.
(and Whitey's on the moon)

 

I can't pay no doctor bill.
(but Whitey's on the moon)
Ten years from now I'll be payin' still.
(while Whitey's on the moon)

 

The man jus' upped my rent las' night.
('cause Whitey's on the moon)
No hot water, no toilets, no lights.
(but Whitey's on the moon)

 

"Whitey on the Moon," Gil Scott-Heron, Genius Lyrics

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A Voyage In Her Lifetime...

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Image Source: Link in the article text

 

Topics: International Space Station, Interstellar, NASA, Space Exploration, Spaceflight, Star Trek

 

Light Sails were first mentioned in the year 1610 in a letter by astronomer Johannes Kepler to his friend, Galileo Galilei. “With ships or sails built for heavenly winds, some will venture into that great vastness.” In his character of Benjamin Sisko on Star Trek: Deep Space Nine, Avery Brooks used his Starfleet engineering prowess deciphering ancient text to recreate an ancient Bajoran solar sail in the episode "Explorers." The possibilities have vacillated between science and fiction ever since.

 

I've enjoyed reading the speculation by Avi Loeb, Chair of Harvard University's Department of Astronomy on the Oumuamua object in Extraterrestrial. I've also enjoyed the healthy counter debate, as that's how ideas in science are refined before they become laws, doctrine, or accepted universal theorems.

 

On the "billionaire space race": Eli Musk started it with his SpaceX rocket system. It would be nice in current geopolitical tensions not to rely so much on Russian Soyuz capsules to get to the ISS. Brian Branson and Jeff Bezos have probably opened up space tourism, but in the foreseeable near-future and exorbitant price tag, it will probably be a dalliance of the wealthy. Desktop computers used to cost between $2,000 - 3,000, cell phones irradiating Gordon Gekko's skull in the movie "Wall Street" used to be the size of Canada. Even the fictional Zefram Cochrane needed a financier, Micah Brack, to get Warp One going. Whether that leads to a utopia of limitless energy, the end to poverty, money, life extension, and eliminating inequality is yet to be seen.

 

The article title, Breakthrough Starshot: A voyage to the stars within our lifetimes, Astronomy Magazine, takes into account the bane of our spacefaring existence: mass, quite literally a "drag," and cannot be compensated for by technobabble "inertia dampeners" or artificial gravity. We are currently accelerating at 9.8 meters per square second to the Earth's center, but we're used to it after living here a while. Twenty percent of the speed of light would get a nano solar sail craft propelled by a high-energy laser to Alpha Centauri in twenty years but would turn human passengers (if any were that small) into DNA goo against the bulkhead. Starshot launching in 2060 means my granddaughter will be forty-one, her parents might be grandparents, and I would have to be a spry ninety-eight to witness it. "Our lifetimes" must be humankind, that is if we haven't overextended our resources to make the endeavor fruitless. From the end of the article:

 

But as award-winning Cosmos writer and producer Ann Druyan, a member of the Breakthrough Starshot advisory board, said during a 2016 press conference announcing the initiative: “Science thinks in timescales of billions of years. And yet, we live in a society that only thinks in terms of, generally, the balance sheet of the next quarter or the next election. … So, this kind of thinking that looks at a horizon that’s 35 years away — possibly 20, possibly 50 — is exactly what’s called for now, because it’s this kind of multigenerational enterprise that nets us such great results.”

 

Godspeed, "Little Bit."

 

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The Lighthouse...

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Creators Brian Haberlin and David Hine take "Jules Verne's Lighthouse" into the depths of deep space piracy starting this April. (Image credit: Image Comics)

Topics: History, Science Fiction, Space Exploration, Spaceflight

Widely considered to be the "Father of Science Fiction," the famed French poet, novelist, and playwright [known] as Jules Verne celebrates what would have been his 193rd birthday this year. 

Born Feb. 8, 1828, Verne ushered in the grand era of speculative fiction with his classic novels, "20,000 Leagues Under the Sea," "From the Earth to the Moon," "Around the World in 80 Days," and "Journey to the Center of the Earth."

Now one of Verne’s lesser-known works from 1905, "The Lighthouse At The End Of The World," is being adapted for the first time into a five-issue comic book miniseries at Image Comics premiering in April. Orchestrated by the veteran creative team of Brian Haberlin and David Hine ("The Marked,'" "Sonata"), "Jules Verne's: Lighthouse" gets a sci-fi twist and casts readers into the high seas of outer space for a swashbuckling cyberpunk saga.

Here's the official synopsis:

"Jules Verne's: Lighthouse" is set at the edge of the galaxy, where there is a giant supercomputer known as the Lighthouse. The only brain powerful enough to navigate ships through a Sargasso of naturally occurring wormholes, potentially cutting months or even years of a spaceship's journey. Three humans, one alien, and a nanny bot have manned the remote station for years in relative peace until the arrival of Captain Kongre and his band of cutthroat pirates threatens the future of civilization and reveals that each of the Lighthouse crew has been hiding a shocking secret. He who controls the Lighthouse controls this part of the galaxy."

Exclusive: A little-known Jules Verne adventure novel scores a sci-fi comic book series with 'Lighthouse', Jeff Spry, Space.com

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40 Years Since STS-1...

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The first mission of the Space Shuttle Program, STS-1, blasts off from launch pad 39A on April 12, 1981, attempting to kick off a new era of rapid access to space.

Topics: History, NASA, Space Exploration, Spaceflight, Space Shuttle

In April 1981, John Young — America’s premier astronaut and one of only 12 people to ever walk on the Moon — was training with co-pilot Bob Crippen for STS-1, the maiden voyage of the space shuttle Columbia. Though eager, Young harbored no illusions that he might never return from this first mission of the Space Shuttle Program.

After rocketing into space, Columbia aimed to circle our planet 36 times over two days. But then, unlike the previous spacecraft, it would glide back to Earth, landing on a runway like an airplane. NASA hoped its reusable fleet of four shuttles — Atlantis, Challenger, Discovery, and Columbia — would launch weekly with crews of up to seven, allowing more rapid access to space than ever before. The Space Shuttle Program promised to both revolutionize and routinize spaceflight.

But, as with all cutting-edge technologies, the risks were severe. A month before STS-1, as Columbia sat on Pad 39A at the Kennedy Space Center in Florida, several technicians were asphyxiated by nitrogen fumes while working in the shuttle’s aft fuselage. Two of them later succumbed to their injuries. The accident served as a deadly reminder that spaceflight is a dangerous business, even when still on Earth.

40 years since the first space shuttle mission, STS-1, Ben Evans, Astronomy

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Snaps From Perseverance...

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Combining two images, this mosaic shows a close-up view of the rock target named “Yeehgo” from the SuperCam instrument on NASA’s Perseverance rover on Mars. The component images were taken by SuperCam’s Remote Micro-Imager (RMI). To be compatible with the rover’s software, “Yeehgo” is an alternative spelling of “Yéigo,” the Navajo word for diligent.
Credits: NASA/JPL-Caltech/LANL/CNES/CNRS/ASU/MSSS
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Touchdown...

 

Topics: Mars, NASA, Perseverance, Space Exploration, Spaceflight

Editor's Note: This release was updated on Feb. 22 to correct the metric unit for the speed at which the rover's wheels made contact with the surface to kph.

A new video from NASA’s Mars 2020 Perseverance rover chronicles major milestones during the final minutes of its entry, descent, and landing (EDL) on the Red Planet on Feb. 18 as the spacecraft plummeted, parachuted, and rocketed toward the surface of Mars. A microphone on the rover also has provided the first audio recording of sounds from Mars.

NASA’s Mars Perseverance Rover Provides Front-Row Seat to Landing, First Audio Recording of Red Planet

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Aiming the Archer...

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The 18 members of NASA's Artemis Team, from top left to bottom right: Joe Acaba, Kayla Barron, Raja Chari, Matthew Dominick, Victor Glover, Woody Hoburg, Jonny Kim, Christina Koch, Kjell Lindgren, Nicole Mann, Anne McClain, Jessica Meir, Jasmin Moghbeli, Kate Rubins, Frank Rubio, Scott Tingle, Jessica Watkins and Stephanie Wilson.  (Image credit: NASA via collectSPACE.com)

Topics: Diversity in Science, Moonbase, NASA, Space Exploration, Spaceflight

Artemis, in Greek religion, the goddess of wild animals, the hunt, and vegetation, and of chastity and childbirth; she was identified by the Romans with Diana. Artemis was the daughter of Zeus and Leto and the twin sister of Apollo. Source: Britannica

The Biden administration's crucial first 100 days in office now includes a big human spaceflight pledge.

White House Press Secretary Jen Psaki said Thursday (Feb. 4) that President Joe Biden will carry on the Artemis program to land humans on the moon in the coming years. Artemis began under Biden's predecessor, then-President Donald Trump. 

"Through the Artemis program, the United States government will work with industry and international partners to send astronauts to the surface of the moon — another man and a woman to the moon," Psaki told reporters in a White House press briefing Thursday.

"Certainly, we support this effort and endeavor," she added.

Psaki's comments, which were in answer to a reporter's question, did not mention NASA's 2024 target for the first crewed Artemis moon landing, a deadline set by the Trump administration. Last year, a bipartisan effort in the U.S. House of Representatives sought to push that landing mission to 2028 instead, in line with NASA's previous goals.

US still committed to landing Artemis astronauts on the moon, White House says, Elizabeth Howell, Space.com

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Rocket Science...

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The Fusion Rocket Concept. ITER

Topics: Mars, Nuclear Fusion, Space Exploration, Spaceflight, Women in Science

A physicist has come up with a new rocket engine thruster concept that could take people to Mars ten times more quickly.

The physicist in question, Fatima Ebrahimi, is the concept's inventor and is part of the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL).

Ebrahimi's study was published in the Journal of Plasma Physics.

An engine thruster based on solar flares

One of the main differences between Ebrahimi's new rocket thruster concept and other space-proven ones is that hers uses magnetic fields to boost particles of plasma out of the back of the rocket. So far, space-proven ones use electric fields to boost plasma.

Plasma is one of the four fundamental states of matter and made of gas ions and free electrons. Our Sun is a burning ball of plasma that uses a fusion reaction, for instance.

New Rocket Thruster Concept to Take Humans to Mars 10 Times Faster, Fabienne Lang, Interesting Engineering

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High Flight...

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In this illustration, NASA's Ingenuity Mars Helicopter stands on the Red Planet's surface as NASA's Perseverance rover (partially visible on the left) rolls away.Credits: NASA/JPL-Caltech

Topics: Mars, NASA, Planetary Science, Space Exploration, Spaceflight

"High Flight" by John Gillespie Magee, Jr.

Ingenuity, a technology experiment, is preparing to attempt the first powered, controlled flight on the Red Planet.

When NASA’s Perseverance rover lands on Mars on Feb. 18, 2021, it will be carrying a small but mighty passenger: Ingenuity, the Mars Helicopter.

The helicopter, which weighs about 4 pounds (1.8 kilograms) on Earth and has a fuselage about the size of a tissue box, started out six years ago as an implausible prospect. Engineers at NASA’s Jet Propulsion Laboratory in Southern California knew it was theoretically possible to fly in Mars’ thin atmosphere, but no one was sure whether they could build a vehicle powerful enough to fly, communicate, and survive autonomously with the extreme restrictions on its mass.

Then the team had to prove in Earthbound tests that it could fly in a Mars-like environment. Now that they’ve checked off those objectives, the team is preparing to test Ingenuity in the actual environment of Mars.

“Our Mars Helicopter team has been doing things that have never been done before – that no one at the outset could be sure could even be done,” said MiMi Aung, the Ingenuity project manager at JPL “We faced many challenges along the way that could have stopped us in our tracks. We are thrilled that we are now so close to demonstrating – on Mars – what Ingenuity can really do.”

Ingenuity survived the intense vibrations of launch on July 30, 2020, and has passed its health checks as it waits to plunge with Perseverance through the Martian atmosphere. But the helicopter won’t attempt its first flight for more than a month after landing: Engineers for the rover and helicopter need time to make sure both robots are ready.

6 Things to Know About NASA’s Mars Helicopter on Its Way to Mars

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Lattice Confinement Fusion...

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Illustration of the main elements of the lattice confinement fusion process observed. In Part (A), a lattice of erbium is loaded with deuterium atoms (i.e., erbium deuteride), which exist here as deuterons. Upon irradiation with a photon beam, a deuteron dissociates, and the neutron and proton are ejected. The ejected neutron collides with another deuteron, accelerating it as an energetic “d*” as seen in (B) and (D). The “d*” induces either screened fusion (C) or screened Oppenheimer-Phillips (O-P) stripping reactions (E). In (C), the energetic “d*” collides with a static deuteron “d” in the lattice, and they fuse together. This fusion reaction releases either a neutron and helium-3 (shown) or a proton and tritium. These fusion products may also react in subsequent nuclear reactions, releasing more energy. In (E), a proton is stripped from an energetic “d*” and is captured by an erbium (Er) atom, which is then converted to a different element, thulium (Tm). If the neutron instead is captured by Er, a new isotope of Er is formed (not shown).

Topics: Astrophysics, NASA, Nuclear Fusion, Propulsion, Space Exploration, Spaceflight

A team of NASA researchers seeking a new energy source for deep-space exploration missions recently revealed a method for triggering nuclear fusion in the space between the atoms of a metal solid.

Their research was published in two peer-reviewed papers in the top journal in the field, Physical Review C, Volume 101 (April 2020): “Nuclear fusion reactions in deuterated metals” and “Novel nuclear reactions observed in bremsstrahlung-irradiated deuterated metals.”

Nuclear fusion is a process that produces energy when two nuclei join to form a heavier nucleus. “Scientists are interested in fusion because it could generate enormous amounts of energy without creating long-lasting radioactive byproducts,” said Theresa Benyo, Ph.D., of NASA’s Glenn Research Center. “However, conventional fusion reactions are difficult to achieve and sustain because they rely on temperatures so extreme to overcome the strong electrostatic repulsion between positively charged nuclei that the process has been impractical.

Called Lattice Confinement Fusion, the method NASA revealed accomplishes fusion reactions with the fuel (deuterium, a widely available non-radioactive hydrogen isotope composed of a proton, neutron, and electron, and denoted “D”) confined in the space between the atoms of a metal solid. In previous fusion research such as inertial confinement fusion, fuel (such as deuterium/tritium) is compressed to extremely high levels but for only a short, nano-second period of time, when fusion can occur. In magnetic confinement fusion, the fuel is heated in a plasma to temperatures much higher than those at the center of the Sun. In the new method, conditions sufficient for fusion are created in the confines of the metal lattice that is held at ambient temperature. While the metal lattice, loaded with deuterium fuel, may initially appear to be at room temperature, the new method creates an energetic environment inside the lattice where individual atoms achieve equivalent fusion-level kinetic energies.

NASA Detects Lattice Confinement Fusion

 

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Crew-1...

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Image Source: NASA

Topics: Astronautics, International Space Station, NASA, Space Exploration, Spaceflight

Happy Veteran's Day.

Expedition 1 and Crew-1. These historic International Space Station missions lifting off 20 years apart share the same goals: advancing humanity by using the space station to learn how to explore farther than ever before, while also conducting research and technology demonstrations benefiting life back on Earth.

Crew-1 made up of NASA astronauts Shannon Walker, Victor Glover, and Mike Hopkins, and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, continues the legacy of two decades of living and working in low-Earth orbit by becoming space scientists for the next six months.

Not only will the Crew-1 astronauts and fellow Expedition 64 NASA astronaut Kate Rubins conduct hundreds of microgravity studies during their mission, but they also deliver new science hardware and experiments carried to space with them inside Crew Dragon.

Check out some of the research flying to the space station alongside Crew-1, and scientific investigations the astronauts will work on during their stay aboard the orbiting laboratory.

  • Food Physiology: A better diet for better health
  • Genes in Space-7: A look at astronauts’ brains
  • Plant Habitat-02: Growing radishes in space
  • BioAsteroid: Microscopic microgravity miners
  • Tissue Chips: Using space to study organs
  • Cardinal Heart: An experiment with heart
  • SERFE: Testing a cool spacesuit

Crew-1 Heads to Space Station to Conduct Microgravity Science, Erin Winick, International Space Station Program Research Office, Johnson Space Center

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One Small Step...

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Topics: Moonbase, NASA, Space Exploration, Spaceflight, Star Trek

Cultural references: Neil Armstrong's quote: "One small step for man, one giant leap for mankind," and the title of a Star Trek Voyager episode, season 6, episode 8.

On August 4, 1972, the sun unleashed an incandescent whip of energy from its surface and flung it toward the planets. It was accompanied by a seething cloud of plasma called a coronal mass ejection, which traversed the nearly 150 million kilometers between sun and Earth in just more than half a day—still the fastest-known arrival time for such outbursts—to briefly bathe our planet in a cosmic fire.

Earth’s shielding magnetosphere crumpled and shrunk by two thirds, sending powerful geomagnetic currents rippling through the planet. Dazzling displays of “northern lights” stretched down to Spain, and overloaded power lines strained as far south as Texas. Off the southern coast of Haiphong, North Vietnam, the seas churned as the celestial disturbance prematurely detonated some two dozen U.S. Navy sea mines. The geomagnetic storm is one of the most violent solar events in recorded history, certainly the most violent of the space age.

The astronauts of Apollo 16 had been home about three months from their lunar foray, and those of Apollo 17 were still preparing for their December launch. The fact that the solar outburst happened between the penultimate and final crewed moon missions was simply a matter of chance. If the members of either crew had been in space during the solar storm, especially if they had been traversing the portion of the “cislunar” region between Earth and the moon that lies outside the magnetosphere, they would have been exposed to a potentially deadly dose of radiation.

We got lucky in 1972. And in terms of space-based hazards, that luck has largely held throughout humanity’s off-world excursions. To date, the only humans to actually die in space were the three cosmonauts of Soyuz 11, who asphyxiated because of faulty hardware as their spacecraft began its descent to Earth. Yet despite what most estimates would seem to consider a near-sterling safety record, today the prospect of venturing back beyond low-Earth orbit somehow seems more daunting—more dangerous—than it did when the Apollo program ended. Equipped with more knowledge than ever about the environs beyond our home, we now seem more reluctant to leave it. Maybe we know too much.

Can a Moon Base be Safe for Astronauts? Rebecca Boyle, Scientific American

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4G on the Moon...

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Topics: Cellular Service, Moonbase, NASA, Space Exploration, Spaceflight

Telecom equipment supplier Nokia will use a $14.1 million grant to build the moon's first wireless network as part of NASA's plans to establish a human presence there.

NASA is investing the money in Nokia-owned American research company Bell Labs, which will build the 4G-LTE network, it said on Wednesday, October 14.

The improved data transmission will help astronauts control lunar rovers, navigate lunar geography in real-time, and stream videos.

The mission ultimately will help show whether it's possible to have "human habitation on the moon," Bell Labs said.

NASA gave Nokia $14.1 million to build a 4G network on the moon, Grace Dean, Business Insider

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SABRE...

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Courtesy: Reaction Engines

 

Topics: Aerodynamics, ESA, NASA, Space Exploration, Spaceflight

 

The pursuit, exploration, and utilization of the space environment can be misinterpreted as a luxury. History portrays space as an exclusive domain for global powers looking to demonstrate their prowess through technological marvels, or the stage for far-off exploration and scientific endeavor with little impact on daily life. However, the benefits of space are already woven into our everyday routines and provide utilities and resources on which society has grown dependent. If these were suddenly to disappear and the world was to experience just “a day without space”, the consequences would be evident to all.

 

The utilization of space is set to become more important still. A new vision for the future is starting to emerge that will feature even more innovative uses of space, ranging from space-based manufacturing and energy production to global Internet connectivity. Space-debris management is also receiving greater focus alongside lunar and Martian exploration, and even space tourism.

 

While some of these new innovations may sound like they are confined to the realm of science fiction, there are already companies furthering the technology to turn them into reality.

 

Conventional rocket vehicles are propelled by a fuel (liquid hydrogen, kerosene, or methane) and an oxidizer (liquid oxygen) carried within the vehicle body. When the fuel and oxidizer combust, mass is projected out of the back of the rocket, creating thrust. However, this approach – and especially the use of heavy onboard liquid oxygen – is constrained by Tsiolkovsky’s rocket equation. It basically tells us that everything carried onboard a vehicle has a penalty in the form of the additional propellant, and structural mass of the vehicle needed to get it off the ground. In other words, this approach hampers mission performance, mission payload, and mission time.

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A concept image of the Reaction Engine’s Synergetic Air-Breathing Rocket Engine (SABRE).

 

SABRE, on the other hand, is a hybrid air-breathing rocket engine. During the atmospheric segment of its ascent, it will use oxygen from the atmosphere instead of carrying it inside the vehicle, before switching to onboard oxygen upon leaving the atmosphere. A SABRE-powered launch vehicle will therefore have a lower mass for a given payload than a conventional rocket vehicle. This mass benefit can be traded for systems that will enable reusability and aircraft-like traits, such as wings, undercarriage, and thermal-protection systems – all the features needed to fly the same vehicle over and over again, achieving hundreds of launches.

 

Air-breathing rocket engines: the future of space flight, Oliver Nailard, Physics World

 

 

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Tang Jet...

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Image source: Link below ("ride the lightning")

Topics: Aerodynamics, Futurism, Plasma, Propulsion, Spaceflight

Personal note: I've been offline prepping for my preliminary exam presentation, and grieving the loss of a friend I had known for 40 years since our freshman year at NC A&T. I was his best man. He did not die of COVID, but a heart attack. As such, my remarks were read at the funeral in Indiana, as the pandemic and social distancing concerns did not allow me to give my eulogy in-person. I hope you will forgive my absence.

This past autumn, a professor at Wuhan University named Jau Tang was hard at work piecing together a thruster prototype that, at first, sounds too good to be true.

The basic idea, he said in an interview, is that his device turns electricity directly into thrust — no fossil fuels required — by using microwaves to energize compressed air into a plasma state and shooting it out like a jet. Tang suggested, without a hint of self-aggrandizement, that it could likely be scaled up enough to fly large commercial passenger planes. Eventually, he says, it might even power spaceships.

Needless to say, these are grandiose claims. A thruster that doesn’t require tanks of fuel sounds suspiciously like science fiction — like the jets on Iron Man’s suit in the Marvel movies, for instance, or the thrusters that allow Doc Brown’s DeLorean to fly in “Back to the Future.”

But in Tang’s telling, his invention — let’s just call it a Tang Jet, which he worked on with Wuhan University collaborators Dan Ye and Jun Li — could have civilization-shifting potential here in the non-fictional world.

This Scientist Says He’s Built a Jet Engine That Turns Electricity Directly Into Thrust, Dan Robitzski, Futurism

 

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Oumuamua...

Mystery of Interstellar Visitor 'Oumuamua Gets Trickier

A 3D illustration of the interstellar object known as ‘Oumuamua. Credit: Getty Images

Topics: Astrophysics, Space Exploration, Spaceflight

Oumuamua—a mysterious, interstellar object that crashed through our solar system two years ago—might, in fact, be alien technology. That’s because an alternative, non-alien explanation might be fatally flawed, as a new study argues.

But most scientists think the idea that we spotted alien technology in our solar system is a long shot.

In 2018, our solar system ran into an object lost in interstellar space. The object, dubbed ‘Oumuamua, seemed to be long and thin—cigar-shaped—and tumbling end over end. Then, close observations showed it was accelerating as if something were pushing on it. Scientists still aren’t sure why.

One explanation? The object was propelled by an alien machine, such as a lightsail—a wide, millimeter-thin machine that accelerates as it’s pushed by solar radiation. The main proponent of this argument was Avi Loeb, a Harvard University astrophysicist.

Most scientists, however, think ‘Oumuamua’s wonky acceleration was likely due to a natural phenomenon. In June, a research team proposed that solid hydrogen was blasting invisibly off the interstellar object’s surface and causing it to speed up. 

Now, in a new paper published Monday (Aug. 17) in The Astrophysical Journal Letters, Loeb and Thiem Hoang, an astrophysicist at the Korea Astronomy and Space Science Institute, argue that the hydrogen hypothesis couldn’t work in the real world—which would mean that there is still hope that our neck of space was once visited by advanced aliens—and that we actually spotted their presence at the time.

Here’s the problem with ‘Oumuamua: It moved like a comet, but didn’t have the classic coma, or tail, of a comet, said astrophysicist Darryl Seligman, an author of the solid hydrogen hypothesis, who is starting a postdoctoral fellowship in astrophysics at the University of Chicago.

Mystery of Interstellar Visitor ‘Oumuamua Gets Trickier, Rafi Letzter, Live Science, Scientific American

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Starliner...

The CST-100 Starliner spacecraft to be flown on Boeing’s Orbital Flight Test (OFT)

The CST-100 Starliner spacecraft to be flown on Boeing’s Orbital Flight Test (OFT) is viewed Nov. 2, 2019, while undergoing launch preparations inside the Commercial Crew and Cargo Processing Facility at Kennedy Space Center in Florida.
Credits: Boeing

Topics: NASA, Space Exploration, Spaceflight

NASA and Boeing continue to make progress toward the company’s second uncrewed flight test of the CST-100 Starliner spacecraft prior to flying astronauts to the International Space Station as part of NASA’s Commercial Crew Program.

The Commercial Crew Program currently is targeting no earlier than December 2020 for launch of the uncrewed Orbital Flight Test-2 (OFT-2) pending hardware readiness, flight software qualification, and launch vehicle and space station manifest priorities.

Over the summer, Boeing’s Starliner team focused on readying the next spacecraft for its upcoming flight tests as well as making improvements identified during various review processes throughout the beginning of the year. NASA also announced an additional crew assignment for its first operational mission, NASA’s Boeing Starliner-1, with astronauts to the space station. Here’s more on the recent progress:

Starliner Progress

Teams from Boeing are well into final assembly of the crew and service modules that will fly OFT-2 to the space station inside of the company’s Commercial Crew and Cargo Processing Facility (C3PF) at NASA’s Kennedy Space Center in Florida. OFT-2 will fly a new, reusable Starliner crew module providing additional on-orbit experience for the operational teams prior to flying missions with astronauts. For Boeing’s Commercial Crew missions, the Starliner spacecraft will launch atop a United Launch Alliance Atlas V rocket.

With the majority of assembly complete, recent progress is focused on the NASA docking system re-entry cover, which was added to the design for additional protection of the system. The team also has completed the installation of the Starliner propellant heater, thermal protection system tiles and the air bags that will be used when the spacecraft touches down for landing. As final production activities continue to progress, the crew module recently entered acceptance testing, which will prove out the systems on the spacecraft before it’s mated with its service module.

Boeing’s Starliner Makes Progress Ahead of Flight Test with Astronauts, NASA

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Ceres...

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Occator Crater and Ahuna Mons appear together in this view of the dwarf planet Ceres obtained by NASA's Dawn spacecraft on February 11, 2017. NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/Handout via REUTERS.

Topics: Asteroids, Exoplanets, Space Exploration, Spaceflight

"Ceres was the Roman goddess of agriculture, grain, and the love a mother bears for her child. She was the daughter of Saturn and Ops, the sister of Jupiter, and the mother of Proserpine. Ceres was a kind and benevolent goddess to the Romans and they had a common expression, "fit for Ceres," which meant splendid." Source: Ceresva.org

WASHINGTON (Reuters) - Ceres, the largest object in the asteroid belt between Mars and Jupiter, is an “ocean world” with a big reservoir of salty water under its frigid surface, scientists said in findings that raise interest in this dwarf planet as a possible outpost for life.

Research published on Monday based on data obtained by NASA’s Dawn spacecraft, which flew as close as 22 miles (35 km) from the surface in 2018, provides a new understanding of Ceres, including evidence indicating it remains geologically active with cryovolcanism - volcanoes oozing icy material.

The findings confirm the presence of a subsurface reservoir of brine - salt-enriched water - remnants of a vast subsurface ocean that has been gradually freezing.

“This elevates Ceres to ‘ocean world’ status, noting that this category does not require the ocean to be global,” said planetary scientist and Dawn principal investigator Carol Raymond. “In the case of Ceres, we know the liquid reservoir is regional scale but we cannot tell for sure that it is global. However, what matters most is that there is liquid on a large scale.”

Dwarf planet Ceres is 'ocean world' with salty water deep underground, Will Dunham, Reuters Science

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Perseverance...

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Image Source: NASA.gov

Topics: Mars, NASA, Space Exploration, Spaceflight

After years of anticipation, NASA hopes to launch its latest robotic explorer, Perseverance, to Mars on Thursday, July 30, at 7:50 A.M. EDT. Set to depart Earth atop an Atlas V-541 rocket from historic Launch Complex 41 at Cape Canaveral Air Force Station in Florida, the ambitious rover is the latest in a long lineage of rolling robotic explorers that NASA has sent to the Red Planet.

If Mars 2020 is not able to blast off during its two-hour launch window tomorrow morning — due to hazardous weather or unforeseen technical issues — the space agency will have just two more weeks to get it done. That’s because after August 15, Mars and Earth will no longer be aligned in a way that allows for quick interplanetary travel, meaning NASA would have to store the rover for two years until the next favorable alignment.

“We have four objectives,” Ken Williford, Deputy Project Scientist for NASA’s Mars 2020 mission, told Astronomy earlier this year. “The first three are really our core science objectives. And the fourth is … preparing for human exploration.”

Perseverance’s science objects are: seeking out sites that were potentially habitable in the past, looking for signs of ancient microbes within rocks known to preserve life, and collecting and storing promising rock samples for a future return mission.

Mars 2020 Launch: NASA's Perseverance Rover Ready for Journey to the Red Planet, Jake Parks, Discovery Magazine

NASA: Perseverance

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Lingua Astra...

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Image Source: What a generational spaceship would actually look like, Rachel Feltman, Popular Science

 

Topics: Evolution, Interstellar Travel, Science Fiction, Spaceflight

Mrs. Flynt played "telephone" with us, simply lining up the entire fifth grade class in one line, arranged with chairs to accent the exercise. She showed a note to the student at the beginning of the line. She then whispered the contents of the note to the student to her right. I heard it from my neighbor, and whispered it in kind. It followed down line until it got to the last: the note's contents had completely changed from the first student to the twentieth.

I do not recall the original contents of the note, but the exercise has been repeated here on Earth without the need for fusion reactors, rotating habitats to induce artificial gravity, space lasers or Klingons. Culture on a generation starship would change from its origin planet. A society would emerge diametrically different than its original, hopefully far better than our current one, inculcating survival principles that would allow it to finish the journey to its destination, and thrive once there.

In science fiction, there’s something called a generation ship: a spacecraft that ferries humankind on a multiple-generation-long journey to brand new star systems or even galaxies.

The idea has also been touted here in the real world by those hell-bent on traversing the stars. But there’s a major problem with the concept, and we’re not talking about the countless generations doomed to be born and die for the sake of a mission they never agreed to — that’s a whole other thing. Rather, Universe Today points out that, if past is prelude, the language spoken on the ship would eventually evolve to the point that it seems incoherent back on Earth.

On an Interstellar Flight, Language Itself Would Evolve, Dan Robitzski, Futurism

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