SLS

A long but interesting article on the questionable future of the NASA Space Launch System.

SLS: to be or not to be, or to be something else entirely

Buzz on Mars vs the Moon

Just as appropriate today, with NASA turning its attention back to the Moon, as it was eight years ago.

“The agency’s current Vision for Space Exploration will waste decades and hundreds of billions of dollars trying to reach the Moon by 2020—a glorified rehash of what we did 40 years ago. Instead of a steppingstone to Mars, NASA’s current lunar plan is a detour. It will derail our Mars effort, siphoning off money and engineering talent for the next two decades. If we aspire to a long-term human presence on Mars—and I believe that should be our overarching goal for the foreseeable future—we must drastically change our focus.”

-Buzz Aldrin (Popular Mechanics interview, January 5, 2010)

Starman Update

“According to the revised data, Rivkin says, it will take the Tesla about 18.8 months to complete one trip around the sun. This means that the car will reach its farthest distance from Earth in about half that time. The Tesla will cross the orbit of Mars twice per orbit, so Musk is still fulfilling his wish to send his Tesla “to” Mars—it’ll just take a little longer between visits.”

Hohmann Orbits and Sports Cars

I want to make this clear: SpaceX is not putting a Tesla into orbit around Mars. Not only would that be illegal by international treaty, but it would be technically impossible with the technology SpaceX currently possesses. What SpaceX is doing is putting a Tesla into a Hohmann Transfer Orbit between Earth and Mars that is very similar to the one we will likely use to get humans to that planet. Continue reading “Hohmann Orbits and Sports Cars”