Scientists say they have found new evidence that there is a hidden planet in our solar system. For years, some astronomers have been suggesting that unusual behaviour on the edge of our solar ...

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A few decades ago, the Solar System had nine planets, but in 2006 the International Astronomical Union reclassified Pluto as ...

The possibility that there might be a large, unknown planet lurking in the outer Solar System far beyond Pluto has long been a staple of science fiction. But for the past decade, astronomers have been ...

Computer simulations suggest that there is an undiscovered Earth-like planet lurking in ... new TNOs could revolutionize our theories about how the solar system formed,” said Lykawka.

However, this year a powerful new telescope is coming online that could prove once and for all that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

Collapsed dead stars, known as neutron stars, are a trillion times denser than lead, and their surface features are largely ...

Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida ...

Trappist-1 b may experience intense volcanism An Earth-sized planet in a star system very similar to our solar system ... suggests new discoveries unknown in the solar system.

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.