As of today Mars will reverse its apparent west-to-east movement in the night sky and begin moving from east-to-west against the background stars. This is called “retrograde motion” and it ...

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest. And even that would be challenging. By Jonathan Corum The distance ...

Is there really life on Mars? Was there once cellular material on the red planet? Scientists have been studying these questions for a long time, and now they have some new information that may ...

On Monday, Mars will look reddish and bright as the ... celestial object passes directly in front of another, hiding the background object from view," NASA says in a skywatching guide.

"An occultation is when one celestial object passes directly in front of another, hiding the background object from view," NASA says in a skywatching guide. The timing of Mars' disappearing act ...