Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

In a event that won't be seen again until the year 2040, seven planets will align in the sky at the same time on 28 February ...

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

Mars will appear to make an ultraclose approach to the moon on Sunday, after Jupiter had a turn earlier this week. Here's how ...

A blue dwarf galaxy pitched through the bullseye's galactic neighborhood 50 million years ago, leaving behind nine glittering ...