The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

While Charon is currently listed as a satellite or moon by the International Astronomical Union (IAU), consideration is being given to it perhaps being classified as a dwarf planet in its own right, ...

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

Planets with suns like Wolf 359 are subject to huge blasts of radiation that raise questions about their long-term ...

The concept of Planet X, or Planet Nine, has captivated astronomers for decades. This hypothetical planet, theorized to be ...

The search began in 2014 when astronomers Scott Sheppard and Chadwick Trujillo noticed unusual patterns in the orbits of several ... home to Pluto and other dwarf planets. Astronomers believe ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, these planets were thought to accrete or eject any other planets present.

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just slightly smaller than Pluto, and it orbits ... player of all time ...

Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, ...

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