Mercury is the smallest planet in our solar system. Mercury is a little more than one-third the width of Earth and has an equatorial diameter of about 3,032 miles (4,880 kilometres).

Mercury is the smallest planet in our solar system. Mercury is a little more than one-third the width of Earth and has an equatorial diameter of about 3,032 miles (4,880 kilometres).

The sun rises from the east, and sets in the west - this is a well-established fact for the longest time, and this is due to ...

Scientists are tracking a large gas planet experiencing quite a quandary as it orbits extremely close to a young star - a ...

Bluish-white Regulus in Leo is moving toward the western horizon and sets around 10 p.m. in mid-July, followed a couple of ...

Editor's Note: If you get a great photo of any of the planets and would like to share it with Space.com's readers, send your photo (s), comments, and your name and location to spacephotos@space.com.

Friday, July 4 Mercury reaches its greatest eastern elongation from the Sun, standing 26° from our star at 1 A.M. EDT. We’ll ...

Learn more about WASP-121b, the exoplanet so hot it could vaporize iron.

Mercury is the month's highlight, reaching greatest elongation July 4. Also on show in the Southern Hemisphere: Mars, Saturn, ...

How can scientists study the meteorology of Venus from Earth since there are currently no missions to Venus? This is what a ...

Imaging data from Japan’s Himawari-8 and -9 meteorological satellites have been successfully used to monitor temporal changes ...