Earth's oceans are mysterious, largely unexplored places, but the enormous oceans of Neptune and Uranus have them beat.

Neptune, for example, has an atmosphere made of hydrogen and helium (with just a tinge of methane), and it doesn’t really ...

Non-mixing layers of water and hydrocarbons thousands of miles deep could explain the icy planets’ strange magnetic fields.

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Get the facts on this planet of extremes. Orbiting the Sun at a distance of 4.5 billion kilometres - more than 30 times further out than the Earth - Neptune is a dark, icy world. Receiving just one ...

On Neptune far out in the solar system it’s ... boosting the sunspot number on its surface and causing more violent outbursts. This sequence of Hubble Space Telescope images chronicles the ...

Feb. 2, 2024 — Astronomers have shown new atmospheric detail in a set of 15 exoplanets similar to Neptune. While none could support humanity, a better understanding of their behavior might help ...

Water becomes a supercritical fluid, converting from a gas to a liquid, at this extremely high pressure, which is more than 60,000 times that of the Earth’s surface. Why are Neptune and Uranus ...