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20 new moons discovered orbiting Saturn

Tuesday, October 15th 2019 09:47 AM

  Astronomers have found 20 new moons orbiting Saturn, bumping its total up to 82 moons. That surpasses Jupiter, which was the prior reigning champion with 79 moons.  One of the new moons has the farthest known orbit around Saturn, and all are similar in size, with diameters around three miles (5 kilometers). Two of the moons take about two years to orbit, while the other 18 tak...

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Giant volcano on Jupiter's moon Io could erupt any second

Tuesday, September 24th 2019 10:55 AM

  A volcano spread across an area greater than Lake Michigan could erupt any day. Located on Jupiter’s moon Io scientists predict that Loki, named after the Norse trickster god, is due to explode sometime in mid-September. The volcano last erupted in May 2018, an event also predicted by scientists. “Loki volcano is huge — 200 kilometers across. It’s large enoug...

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Water found in habitable super-Earth's atmosphere for first time

Thursday, September 12th 2019 11:32 AM

  Astronomers have finally uncovered water vapor in the atmosphere of a super-Earth exoplanet orbiting within the habitable zone of its star. The find means that liquid water could also exist on the rocky world's surface, potentially even forming a global ocean. The discovery, made with NASA's Hubble Space Telescope, serves as the first detection of water vapor in the atmosphere...

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Supermassive black holes stop star formation in dwarf galaxies

Friday, October 18th 2019 03:07 PM

  Astronomers know that most galaxies house supermassive black holes in their centers, from the largest galaxies down to small dwarfs. They also know that when supermassive black holes are actively feeding, they can slow or even stop the formation of stars in their home. Although this relationship has been well established for large galaxies, it has not been studied much in dwarf galax...

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How the first exoplanets were discovered

Tuesday, October 15th 2019 09:56 AM

  In 1992, astronomers discovered the first exoplanet, or planet outside our solar system. But it didn’t come in any form they’d really anticipated. Neutron stars are the second densest type of object in the universe outside black holes. They form when a giant star dies and explodes outward as a result of the collapse of its core. Put simply, the star becomes too massive t...

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How galaxies and their supermassive black holes grow together

Tuesday, October 15th 2019 09:51 AM

  Every massive galaxy likely harbors a supermassive black hole at its center, weighing in at millions or even billions of times the mass of our Sun. Earlier this year, for the first time ever, a team even managed to image the shadow cast by one of these objects on the hot gas and dust around it. But while supermassive black holes are ubiquitous and well studied, the link betwe...

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