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August 27, 2012 - Far-Out Galactic Interactions

27 Aug 2012, 04:00 UTC
August 27, 2012 - Far-Out Galactic Interactions
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The Week in SpaceAugust 27 - September 2, 2012 Far-Out Galactic Interactions In April 2011, astronomers pointed the Hubble Space Telescope at an especially photogenic pair of interacting galaxies called Arp 273. The larger spiral galaxy, known as UGC 1810, has a disk that is distorted into a rosette shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. A swath of blue jewel-like points across the top is the combined light from clusters of intensely bright and hot young blue stars. These massive stars glow fiercely in ultraviolet light. The smaller, nearly edge-on companion shows distinct signs of intense star formation at its nucleus, perhaps triggered by the encounter with the companion galaxy. Arp 273 lies in the constellation Andromeda and is roughly 300 million light-years away from Earth. Image credit: NASA / ESA / Hubble Heritage Team (STScI/AURA) Weekly CalendarAugust 27 - September 2, 2012Holidays - Sky Events - Space History Monday 271962: Mariner 2 launched 1984: Teacher In Space program announced 1985: STS-51I Discovery launched Tuesday 281789: William Herschel discovers Enceladus, moon of Saturn 1993: Galileo spacecraft flies by asteroid Ida 2009: STS-128 Discovery launched Wednesday 29 Thursday 301963: Lunar Orbiter ...

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