Spacecraft burn tons of fuel and leave behind debris—but a clever technique called aerobraking could fix both problems.

Mars' two moons, Phobos and Deimos ... They're just as likely to orbit retrograde (the opposite direction) or at a high inclination as any other direction, and yet these two appear to be in ...

As the year 1999 began, the Jet Propulsion Laboratory (JPL) in Pasadena, California, was arguably closer to launching a robotic Mars Sample Return (MSR) mission than ever before. About one martian ...

Retrograde is the backward movement relative to its usual direction ... Its stop and turnaround in its orbit is because Earth is passing Mars at a faster rate of speed. On average, Mars goes ...

Usually, it moves in the same direction as the stars ... Kepler was one of the first scientists to seriously study the orbit of Mars. Credit...Universal History Archive/Getty Images A more ...

Languages: English. You can get in touch with Jess by emailing [email protected]. Mars' distant orbit may have more of an impact on our planet than we first thought. The interaction between ...