The Sun is an incandescent but benevolent dictator. For billions of years, it's kept our Solar System well organized and ...

Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist.

The evolution of the orbits of the planets is a complex process. Initially the planets formed out of a rotating disk of gas ...

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

For billions of years, it's kept our star system well organized through the influence of its powerful gravity. All the planets ... between the Sun and the Earth — of the solar system's center ...

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

It's possible for our solar system to capture a rogue planet and give it a home as it hurtles through the galaxy, according ...

Many more ISOs must have visited in our solar system's long history, and many more will visit in the future. There are ...

These evenings, when it is clear, there is (what appears to be) a fairly bright yellow "star" in the southern sky. It is not ...

Encountering Neptune in 1989, NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer ...

The key to this phenomenon lies in the concept of phase space, a mathematical representation that describes the state of a ...

For two decades now, the iconic twin Voyager spacecraft have been quietly overturning everything we thought we knew about the ...