| | November 18
Mind-Boggling Mars Mystery | | | |
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 | | The most recent self-portrait of NASA's Curiosity on Mars, stitched together from 57 individual images taken by a camera on the end of Curiosity's robotic arm on October 11. Image via NASA/JPL-Caltech/MSSS. Read more. | | |
| Curiosity's 'mind-boggling' new Mars mystery: oxygen | | | The presence of methane in Mars' atmosphere has been a fascinating puzzle for planetary scientists. That's because, on Earth, methane is linked to life, but it can also be produced geologically. Some of the best data about Mars' methane has come from the Curiosity rover, which landed on Mars in August, 2012. Now Curiosity has made another intriguing discovery: oxygen at the rover's location is behaving in ways that haven't yet been explained by any known atmospheric or chemical process. Read more. | | | Black hole hurls star out of Milky Way | | | Astronomers have spotted a star - S5-HVs1 - speeding out of the Milky Way at around 4 million miles (more than 6 million km) per hour. They believe it's being ejected from our galaxy after venturing too near the giant black hole at the Milky Way's heart about 5 million years ago. Read more. | | | | | | | |
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|  | | Moon and Leo from midnight until dawn | | By Tuesday morning, we'll be just one day past the peak of the Leonid meteor shower. 2019's peak was mostly drowned in bright moonlight, and - if you look outside before dawn in the next few days - you'll see the moon is moving in front of the Leonids' radiant point in the constellation Leo the Lion. You likely won't see the moon and Regulus, Leo's brightest star, before your bedtime Monday night. Watch for them before dawn this week. Read more. | | | | | |
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 | | | SpaceX Starlink satellite swarm | View at EarthSky Community Photos. | Our friend Padraic Koen was in Arkaroola, South Australia, this morning, when a swarm of 25 SpaceX StarLink satellites passed over between 4:51 and 5:01 a.m. He created this composite of three 15-second shots - taken a few minutes apart - that captured 14 of the satellites. Thank you, Padraic! Read more and find links to how you can view the satellites. | | |
