Mercury, the closest planet to the sun, moves faster than Earth. It orbits the sun in 88 days, as opposed to our 365. So about every four months, "Mercury laps us on the track, and that makes it ...

John Casani, who has died aged 92, was an American spaceflight engineer who led the teams that pioneered Nasa’s explorations ...

When considering space colonization, most discussions focus on the Moon and Mars. While they’re relatively close to Earth and ...