NASA still views the moon as a stepping stone to Mars, even though Elon Musk has dismissed Earth's nearest neighbor as "a ...

Each planet in our solar system is given a unique, humorous catchphrase that reflects its personality and role. From ...

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

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...