Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

Mars has two moons, Phobos and Deimos. Scientists still debate whether these came from asteroids that passed close into Mars' ...

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around, including Venus, Mars ...

Auroras are beautiful phenomena on Earth, but they aren't specific to this planet. In fact, they appear on many other planets ...

A new study of a forming planet shows it doesn't match the chemical makeup of its birth disk, challenging pas theories on how ...

• Saturn, of magnitude +1.1, 16° to the upper left of Venus. The brighter planet will pass 2.2° north of Saturn on Jan. 18; Saturn will be nearly 11° below Venus on Jan. 31. A telescope reveals Saturn ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars. When you purchase through links on our site, we may earn an affiliate commission.

Encountering Neptune in 1989, NASA's Voyager mission completed humankind's first close-up exploration of the four giant outer planets of our solar system ... and Neptune in order to understand ...

However, exactly how that happens for a multi-planet star system — like our solar system — is unknown. The paper, published today in The Astrophysical Journal Letters, details observations of ...

Scientists have made a groundbreaking discovery about how our solar system could potentially capture a new planet. According to a research note in Celestial Mechanics and Dynamical Astronomy ...