Neptune is called an “ice giant” because it’s mostly made of a thick, slushy mix of water, methane, and ammonia, which ...

NASA's James Webb Space Telescope has been unwaveringly focused on our universe. With its unprecedented power to detect and ...

Learn more about WASP-121b, the exoplanet so hot it could vaporize iron.

The solar wind pushes some of the gas and dust away from the comet, forming those beautiful tails we see. A comet actually ...

In the frozen outskirts of the solar system, a reddish dwarf planet orbits in silence. Known as Sedna, it is so distant that ...

Astronomers have spotted unusual molecular activity in the largest Oort Cloud comet, comet Bernardinelli-Bernstein (C/2014 ...

Using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, scientists caught the comet spewing carbon monoxide while drifting near Neptune’s orbit ... to see more volatile substances, ...

NASA's James Webb Space Telescope (JWST) has found water swirling in the air of a distant alien planet, a new study reports. That exotic world is TOI-421 b, a boiling-hot " sub-Neptune " orbiting ...

Beyond our solar system, sub-Neptunes — gassy planets larger than Earth but smaller than Neptune — reign as the most common type of exoplanet observed in our galaxy. Despite their prevalence ...

Does it rain diamonds on Neptune and Uranus? Scientists uncover how extreme pressure and temperature deep inside these ice giants create a continuous diamond rain.

New models using Voyager 2 data show that separate layers in the planets’ mantles could be creating disordered magnetic fields.

The traces of methane on Neptune do more than give the planet a cobalt coat. They reveal the planet’s origins—that Neptune likely migrated inward sometime during its early history.