The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

February will be an awe-inspiring month for astronomy enthusiasts who will be able to the see the solar system's planets ...

Although the occurrence climaxed on Jan. 21 with a conjunction—close alignment—of Saturn and Mercury, the planetary parade ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Shimpei Yamashita via Getty Images The night sky will offer stargazers a special sight for the next several weeks: Right now, all planets except Mercury can be seen after sundown—then ...

Mars, Jupiter, Uranus, Venus, Neptune, Mercury and Saturn will appear in a row on the evening of 28 February, marking the last time for 15 years that all of the planets will be visible at the same ...