Over a thousand objects are now known to orbit the Sun beyond Neptune, and once again we can't imagine torturing school children by adding even a dozen of the biggest ones to the list of planets.

Mercury is known as “a personal planet,” similar to Venus and Mars. This is because they are closer to the sun and the earth astronomically, while astrologically, Thomas says they “align ...

A new classification scheme may help us better understand planet formation — including the history of our own family of worlds.

Get closer to our solar companions with the best telescopes for seeing planets, just in time for ... this February 7 and 9 respectively, an event known as an appulse. Then, on February 24 ...

Astronomers have spotted the shiniest known planet in the Milky Way, and it has metal clouds that appear to be raining down titanium droplets. Exoplanet LTT9779 b, which orbits a star about 262 ...

Astronomers have captured direct images of exoplanets in a star system 130 light years away, providing clues on gas giant ...

Sometimes these happenings are also known as "planet parades." The alignment should be relatively easy to see. A suggestion on the NASA website added, "Find an area well away from the city or ...