Mercury takes only 88 Earth days to orbit the sun.

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

Look up in Michigan's night sky later this month to catch a rare seven-planet parade. The planets will appear to line up in the sky as they orbit the sun, known as a planetary alignment or planet ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

A UVic doctoral candidate led a new study that offers a clearer picture of how planets are born alongside stars, findings ...

According to Dr. Grundy, Pluto is a planet. "I use the word 'planet' to refer to it, and most of the planetary science ...

You'll want to get away from the city, where light pollution can obfuscate ... you'll have a particularly difficult task ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.