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 ...

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.

This distant orbathing red dwarf star, at about 47 light-years distance from Earth, presents unique planetary attributes different from all known solar system planets. Scientific classification names ...

the solar system would have resembled a mini-version of the PDS 70 system. Astronomers at the University of Arizona imaged the extrasolar planets, or "exoplanets," using the sophisticated Magellan ...