An exoplanet in the Trappist star system — a multi-planet star system similar to the solar system and just 39 light-years ...

Spinning in only about 35,700 seconds, its day is the shortest in our solar system, and it only has a 3-degree tilt, so it ...

Planetary scientists recently simulated an alternate version of our solar system: one with a super-Earth causing climate chaos on Earth, Mars and Venus. One of the most common types of planets in ...

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars.

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...

In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

For more on where Earth and our Solar System fit into the deep history of the cosmos, check out the other posts in this series: How Old is the Universe? and How Old is the Earth?

The equipment required for a solar power system varies slightly depending on ... Several factors affect optimal conditions, ...

Saturn is one of four planets in our solar system that have the distinctive feature. And now, scientists hypothesize that Earth may have sported its own ring some 466 million years ago.

Massive object passing through solar system is a better explanation for nature of orbits of Jupiter, Saturn and Neptune ...