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Jupiter's 'tormented moon' Io just unleashed the most powerful volcanic event ever seen
By Harry Baker published
NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in this area are chucking out six times the energy being produced by all Earth's power stations, researchers say.

Which planet is closest to the sun?
By Briley Lewis published
Mercury takes only 88 Earth days to orbit the sun.

Newly discovered super-Earth orbits in and out of its star's habitable zone. Could life survive its extreme climate?
By Keith Cooper published
The climate on such a world must be beyond bizarre.

Mars quiz: Is your knowledge of the Red Planet out of this world?
By Harry Baker published
Quiz Think you know Mars? Test your knowledge of our neighboring planet's size, surface, history and more.

We may finally know what causes Mars' gigantic, planet-wide dust storms
By Abha Jain published
Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' dust storms, a new study suggests.

See a 'parade' of 6 planets fill the sky on Saturday night — before a bonus 7th planet joins in March
By Jamie Carter last updated
Worlds will align for a "planetary parade" in January, with four bright and easily visible to the naked eye. But an even better view arrives in February and March. Here's what you need to know.

'Supersonic jetstream' with winds 130 times faster than a Category 5 hurricane spotted in the Milky Way
By Harry Baker published
The record-breaking winds are circling the nearby "puffy" exoplanet WASP-127b, and are traveling six times faster than the alien world spins.

'Marsquakes' may solve 50-year-old mystery about the Red Planet
By Harry Baker published
Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" that splits the Red Planet into two distinct halves.

How Pluto captured its largest moon Charon with a 10-hour icy 'kiss'
By Robert Lea published
Pluto may have got romantic to capture its largest moon, colliding and engaging in a passionate but icy 10 hour kiss with Charon billions of years ago.

How to watch the full Wolf Moon 'swallow' Mars in the sky tonight — no telescope required
By Gretchen Rundorff last updated
Tonight (Jan. 13), bright Mars will disappear behind the full Wolf Moon for several hours before reappearing on the other side. It's the only lunar occultation of Mars visible from the U.S. this year. Here's how to get the most out of it.
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