The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

Eclipses don’t just happen on Earth — they occur all across the solar system. But the objects that block the sun on other ...

A team of astronomers poring through old astronomical data may have seen a candidate for the elusive Planet Nine – a ...

An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

With its beautiful rings, Saturn may be the most stunning planet in the solar system. It is the sixth planet from the sun and ...

Our sun is wobbling, and this has a huge impact upon the regularity of many of Earth's meteor showers, according to a new ...