The Hubble Space Telescope has peered at Uranus, left, and Neptune to study the so-called "ice giant" planets, but little is known about their interior composition. - NASA / ESA / M. Showalter / L.

Models for the interior structures of the ice-giant planets Uranus and Neptune have two distinct, intermediate layers: an upper, water-rich convecting layer where disorganized magnetic fields are ...

Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years, ...

This work's sample overlaid with known transiting planets. Hexagons indicate planets in our sample also being observed by JWST through Cycle 2, while triangles are not yet scheduled or approved for ...

Artist’s concept of a Neptune-sized planet, left, around a blue, A-type star. UC Berkeley astronomers have discovered a hard-to-find gas giant around one of these bright, but short-lived, stars, right ...

Add Yahoo as a preferred source to see more of our stories on Google. Artist's illustration of Planet Nine, a hypothetical world that some scientists think lurks undiscovered in the far outer solar ...

In 1989, Voyager 2 became the first and only spacecraft to ever fly by Neptune, and images from that mission famously show a planet that’s a deep azure color. But in reality, Neptune is far more of a ...

The 2024 astronomical calendar is packed with events; And there's more to look forward to, despite the eclipse and auroras already having passed overhead. Nicknamed the "planet parade," a planetary ...

In 1989, Voyager 2 became the first and only spacecraft to ever fly by Neptune, and images from that mission famously show a planet that's a deep azure color. But in reality, Neptune is far more of a ...