Sky and Telescope 15 Sep 2020, 09:29 UTC An international team of researchers led by Jane Greaves (Cardiff University, UK) has announced the detection of phosphine in the cool cloud decks of Venus. If the detection pans out, it might be a sign of life on our sister planet.
Centauri Dreams 14 Sep 2020, 15:47 UTC Io, Jupiter’s large, inner Galilean moon, is the very definition of a tortured surface, as seen in the image below, taken by the Galileo spacecraft in 1997. Discovering volcanic activity — and plenty of it — on Io was one of the early Voyager surprises, even if it didn’t surprise astrophysicist Stanton Peale (UC-Santa Barbara) and colleagues, who predicted the phenomenon in a paper published shortly before Voyager 1’s encounter. We now know that Io is home to over 400 active volcanoes, making it the most geologically active body in the Solar System.
Astro Bob 11 Sep 2020, 16:50 UTC This morning, I heard a neighbor a block over start his car and drive off just after 5. He’s not the only early riser. Maybe you get up early, too. If so, throw on a coat and go outside. Venus blazes in the eastern sky, and if you point binoculars at it the next few days you’ll see a wonderful conjunction of the planet and one the sky’s brightest star clusters, the Beehive. Also known as M44 (the 44th entry in Charles Messier’s famous catalog of bright sky sights), this swarm of stellar bees buzzes at the center of the constellation Cancer the crab.
Discover 11 Sep 2020, 13:00 UTC The cosmos will come to a close through a cold and lonely death called the Big Freeze.
Universe Today 10 Sep 2020, 22:28 UTC The better our technologies get, the better we get at finding objects in space. That’s certainly true of Jupiter and its moons. Prior to Galileo, nobody knew the other planets had moons. Then in 1609/10, as he made improvements to his telescope, he aimed it at the gas giant and eventually found four moons: Io, Europa, Ganymede, and Callisto. Now those four natural satellites also bear his name: the Galilean moons.