Yesterday, a mysterious group called the Inspiration Mars Foundation announced vague plans for a “historic journey to Mars and back in 501 days” scheduled for 2018. The group neglected to mention if the trip would be manned, instead directing the public to a press conference scheduled for February 27. But new information reveals that the individuals behind the Inspiration Mars Foundation plan to send two people on a flight to Mars and back—presumably in one piece.
Not that I'm a pessimist, but some facts about spaceflight seems missing from this bold endeavor:
Time and propulsion technologies: at current rates of speed, let's pick the average to obtain LEO - low earth orbit ~ 17,000 mph (27358.8 kph).
The average distance between Earth and Mars is 140 million miles (225 million km).
Thus, your trip would take roughly 8,235 hours, or 343 days. These are of course, my "back of the envelope calculations."
Human frailty: we tend to like gravity, and lose muscle mass as well as bone density just in LEO on the ISS.
According to Universe Today: "The total journey time from Earth to Mars takes between 150-300 days depending on the speed of the launch, the alignment of Earth and Mars, and the length of the journey the spacecraft takes to reach its target. It really just depends on how much fuel you’re willing to burn to get there. More fuel, shorter travel time."
So, mysterious cabal or not: it's going to take some serious engineering to get to Mars, loads of fuel and/or a very large solar sail. Unfortunately, all of that costs money that if you've noticed, we're having a bit of trouble counting...not mad at you, though.
Scientific American: Millionaire Plans Mission to Mars in 2018
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