Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.

The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

the nearest single star system to Earth. The four planets are classified as sub-Earths because each one is about 19% to 34% the mass of Earth, according to new research. “It’s a really ...

CHICAGO — Astronomers have discovered new evidence of small planets orbiting Barnard's Star, the closest single star system to Earth. The team at the University of Chicago identified four planets, ...

We know that Luke and Vader defeated Palpatine and toppled the Empire, but several other characters had their own plans to take down the Emperor.

Now, they seem to have gotten their wish. Recent observations suggest there may be four miniature planets orbiting Barnard’s Star. Each is calculated to be just 20 to 30% the mass of Earth and ...

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SEE ALSO: Stop describing a planet as 'Earth-like' unless it really is This marks the first time so many Earth-sized worlds have been found orbiting the same star. It's possible that some of those ...

Traditional models have suggested that planetesimals -- the tiny building blocks of planets -- formed across wide regions of a young star's disk. But Shibata and Izidoro suggest a different theory ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard’s Star, the second-nearest star system to Earth. The four planets, each only about 20 ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth. Astronomers have revealed new ...