A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Experts told Newsweek about the difficulties of reaching Mars as the United States faces complex challenges in space policy.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

Donald Trump has claimed that it is America's 'manifest destiny' to expand to Mars. So, could the Red Planet really become ...

In January and February, a spectacular planetary parade will be visible in the night sky. The celestial alignment of Venus, ...