With an equatorial diameter of 7926 miles (12,760 kilometers), our planet Earth is the biggest of the terrestrial planets and ...
Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...
A parade of seven planets is set to appear in the night sky this month, and it will be the last of its kind until 2040.
“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...
For a brief moment at the end of February, every planet will appear in the night sky simultaneously in a rare celestial ...
Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...