Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class ...

New observations from NASA's James Webb Space Telescope have revealed that auroras on Jupiter are hundreds of times brighter ...

The presence of this planet would explain a number of quirks in our Solar System ... Nine. NASA added: "Another possibility is that Planet X (Planet Nine) does not exist at all.

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

NASA, ESA, and C. Fuentes (Harvard-Smithsonian Center for Astrophysics) In a distant corner of our solar system called the ...