Astronomers using the James Webb Space Telescope have uncovered surprising evidence about how enormous “super Jupiter” ...

The galaxy’s most common stars rarely host sub-Neptune planets, revealing a new pattern in how close-in worlds form.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A distant exoplanet that shouldn't be there anymore has continued to ...

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...

Researchers at the California Institute of Technology (Caltech) have found new evidence that further suggests there is a ninth planet in our solar system. Nicknamed "Planet Nine," researchers said ...

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Swipe Down for Full Video Story Most of us learned that the Solar System has eight planets. For many years, Pluto made it ...

Planet 9 sits at the edge of scientific imagination, promising either an epic expansion of the Solar System or a lesson in how easily patterns can mislead us. As new data arrive and old assumptions ...

Astronomers believe they've solved a peculiar and well-established cosmic mystery, NASA announced this week. Mainly using observations from the James Webb Space Telescope, two groups of researchers ...