So, why are so many exoplanets known as "hot Jupiters" orbiting very close to their stars? That's the question astronomers ask as they study more of these extreme worlds. It turns out that hot ...

Ultra-hot Jupiters (UHJs) are some of the most fascinating astronomical objects in the cosmos, classified as having orbital periods of less than approximately three days with dayside temperatures ...

If you didn't know, Jupiter has no solid ground – no surface, like the grass or dirt you tread here on Earth. Let's explain ...

The images were taken during the spacecraft's 66th close flyby of Jupiter on Oct. 23. NASA's Juno spacecraft has sent back stunning photos of Jupiter, including colorful, chaotic storms swirling ...

The dividing line between stars and planets is that stars have enough mass to fuse hydrogen into helium to produce their own ...