Mercury takes only 88 Earth days to orbit the sun.

Saturn may be difficult to see since it will be near the sun, according to StarWalk. It's not especially remarkable for a few ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

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

This arc is known as the ecliptic — the plane on which the planets orbit the sun. From our viewpoint on Earth, they don’t ...

"With an orbital period of 570 days, it is a relatively cold gas giant planet," said Guðmundur Stefánsson of the University ...

By mid March the planets will begin to disband, some becoming hidden by the sun’s glare while others enter the early morning sky. It’s amazing to think that when you look up at these planets ...

Known as the "Parade of Planets," the celestial event will feature appearances from Mars, Jupiter, Uranus, Venus, Neptune and ...

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

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