The Sun, our nearest celestial neighbor, is undeniably a star, not a planet, as centuries of astronomical observations have ...

Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

Planet Nine, the undiscovered planet at the edge of the solar system that was predicted by the work of Caltech’s Konstantin Batygin and Mike Brown in January 2016, appears to be responsible for the ...

There are eight planets in the solar system, and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some ...

Just because Pluto was ruled out as a planet in 2006 doesn’t mean our solar system only has eight planets. The search for Planet Nine is far from over as scientists continue to uncover clues ...

Astronomers using the European Space Agency's XMM-Newton space observatory and the LOFAR telescope have definitively spotted ...

For the first time ever, astronomers have spotted a powerful coronal flare (cme) from a star other than the Sun.