UGC 12591: The Fastest Rotating Galaxy Known


Why does this galaxy spin so fast? To start, even identifying which type of galaxy UGC 12591 is difficult -- featured on the lower left, it has dark dust lanes like a spiral galaxy but a large diffuse bulge of stars like a lenticular. Surprisingly observations show that UGC 12591 spins at about 480 km/sec, almost twice as fast as our Milky Way, and the fastest rotation rate yet measured. The mass needed to hold together a galaxy spinning this fast is several times the mass of our Milky Way Galaxy. Progenitor scenarios for UGC 12591 include slow growth by accreting ambient matter, or rapid growth through a recent galaxy collision or collisions -- future observations may tell. The light we see today from UGC 12591 left about 400 million years ago, when trees were first developing on Earth. via NASA https://ift.tt/326jqJe

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Like Video : 10대는 코인노래방, 20대는 익선동, 30대는 회사 옥상으로 모이는 이유 | #어쩌다어른 #사피엔스

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10대는 코인노래방, 20대는 익선동, 30대는 회사 옥상으로 모이는 이유 | #어쩌다어른 #사피엔스 #유현준 어쩌다어른(2019) 대한민국 대표 강연자들의 다시 보고 싶은 명강의가 새로운 인사이트로 돌아온다! 난생처음 어른이 된 우리를 위한, 각 분야 지식인들의 울림 있는 유머와 깊이 있는 통찰! 《책 읽어 드립니다》, 《어쩌다 어른》제작진이 만든 대한민국 대표 지식 큐레이팅 채널 『사피엔스』 → https://bit.ly/32dm9Cq https://www.youtube.com/watch?v=pJpbGsHb87o
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Light and Glory over Crete

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The month was July, the place was the Greek island of Crete, and the sky was spectacular. Of course there were the usual stars like Polaris, Vega, and Antares -- and that common asterism everyone knows: the Big Dipper. But this sky was just getting started. The band of the Milky Way Galaxy stunned as it arched across the night like a bridge made of stars and dust but dotted with red nebula like candy. The planets Saturn and Jupiter were so bright you wanted to stop people on the beach and point them out. The air glowed like a rainbow -- but what really grabbed the glory was a comet. Just above the northern horizon, Comet NEOWISE spread its tails like nothing you had ever seen before or might ever see again. Staring in amazement, there was only one thing to do: take a picture. via NASA https://ift.tt/2UuR9Jh
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