jupiter

Sadly, Astronomers Just Lost Three Exoplanets. Here’s Why

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What we thought were three confirmed exoplanets have just been knocked off their perch – and a fourth one is under serious doubt. According to a new analysis using revised characteristics, the objects Kepler-854b, Kepler-840b, and Kepler-699b seem to be too big to be exoplanets after all. That means they must be stars. The fourth … Read more

Why Isn’t Jupiter a Star?

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The smallest known main-sequence star in the Milky Way galaxy is a real pixie of a thing. It’s called EBLM J0555-57Ab, a red dwarf 600 light-years away. With a mean radius of around 59,000 kilometers, it’s just a smidge bigger than Saturn. That makes it the tiniest known star to support hydrogen fusion in its core, … Read more

Metal clouds and liquid gems spotted in the atmosphere of hot Jupiter WASP-121 b

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An artist’s impression of the hot Jupiter exoplanet WASP-121 b. In a new study, researchers explored the exoplanet’s nightside.  (Image credit: Patricia Klein and MPIA) Imagine a world where the clouds are made of metal and liquid rubies and sapphires rain down from the sky. A new study shows that, on the hot Jupiter exoplanet … Read more

NASA probe snaps stunning photos of crescent Jupiter and its moon Ganymede

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Data captured by NASA’s Juno spacecraft is revealing incredible new images of Jupiter and its moon Ganymede. In a blog post on Monday (Feb. 14), Juno mission team members shared images of a huge crater on Ganymede as well as a backlit picture of Jupiter that the spacecraft captured during its dips in and out … Read more

How big is Jupiter? | Space

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It is the largest planet in the solar system, but just how big is Jupiter? The gas giant is approximately 318 times as massive as Earth, according to planetary scientist Alan Boss. If the mass of all of the other planets in the solar system were combined into one “super planet,” Jupiter would still be … Read more

Enigmatic High-Energy X-Rays Have Been Spied Coming From Jupiter

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Jupiter has finally been observed spitting out X-rays in high-energy wavelengths. Emanating from the giant planet’s permanent auroras, and detected by NASA’s space-based X-ray telescope NuSTAR, the emissions are the most energetic light seen coming from any planet in the Solar System (aside from Earth).   The detection could shed light on the most powerful … Read more

NASA space telescope spots most powerful light ever seen on Jupiter, helps solve 30-year-old mystery

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Jupiter’s southern hemisphere, as seen by NASA’s Juno spacecraft. In a new study, NASA’s NuSTAR space telescope spots the highest-energy light from Jupiter. (Image credit: Enhanced image by Kevin M. Gill (CC-BY) based on images provided courtesy of NASA/JPL-Caltech/SwRI/MSSS ) NASA has detected the most energetic light ever seen on Jupiter and, in the process, … Read more

How a Magnetic ‘Tug-of-War’ With Io’s Volcanic Eruptions Creates Jupiter’s Auroras

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Jupiter’s auroras – the lights that dance around its poles – are the most distinct in our solar system and over a thousand times brighter than Earth’s aurora. Now, a new study confirms that these otherworldly polar lights come from a unique source: space lava.   Jupiter‘s moon Io is the most volcanically active world in the solar … Read more