Category: Planetary Exploration

Propulsion-less Space Travel

The problem with space travel is that of propulsion. One has to literally throw stuff out of the back of the ship to accelerate. Basically, give that stuff momentum in one direction, and the ship will gain momentum in the…

Fifty Years of Exploration

Exactly 50 years ago, July 14th and 15th, 1965, the Mariner 4 Probe made the first fly-by of another planet, Mars. Yesterday, July 14, 2015, New Horizons made the first fly-by of Pluto, thus completing our first survey of the…