Kuiper Belt clues, competing ideas, and how Rubin Observatory could finally reveal the hidden world soon by 2026.

For decades, Uranus and Neptune have carried the tidy label of “ice giants,” shorthand for worlds built mostly from frozen ...

New research suggests Uranus and Neptune may not be true ice giants, with rocky interiors dominating instead, challenging ...

Recent research suggests that Uranus and Neptune, long classified as “ice giants,” might instead be rock giants.

New models suggest Uranus and Neptune may hold far more rock than expected, raising questions about how these distant planets formed.

For decades, school posters and science museum displays have grouped Uranus and Neptune together as “ice giants,” a tidy ...

Fresh simulations show there is a chance Uranus and Neptune might actually be rock-rich worlds wrapped in thinner icy layers.

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

Fantasizing about interplanetary exploration is a fun mental exercise, but the harsh realities of life (or lack thereof) in our Solar System is for good reason.

Like many scientists before him, Caltech Graduate Student Thomas McCord was searching for other answers when he made his unexpected discovery. Curious about the odd behavior of the planet Neptune’s ...

For centuries, humans have gazed into the night sky, wondering what lies beyond the planets we know. Each new discovery in the Solar System reshapes our sense of place in the cosmos. Now, astronomers ...

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