Proponents of going to Mars see peril and opportunity in Elon Musk's close relationship with Trump. Experts say just getting ...

Casey Dreier, chief of space policy at the Planetary Society, highlighted the absence of critical technologies such as life-support systems and infrastructure that are critical for a mission to Mars ...

A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.

Six planets are part of the alignment, which will last until Feb. 18. Mercury will join the alignment later in the month.

The highlight of this cosmic event is Venus, which will shine at its brightest on Sunday, February 16, making it the most ...

In a celestial event known as a great alignment the five planets will be discernible with the naked eye, but to see Neptune ...