M51 - Whirlpool Galaxy (Anders Gengård)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 51 · NGC 5194 · NGC 5195 · Whirlpool galaxy

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M51 - Whirlpool Galaxy

Link: https://flic.kr/s/aHsmpbZkJ5

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M51 - Whirlpool Galaxy

Link: https://flic.kr/s/aHsmpbZkJ5

M51 - Whirlpool Galaxy eller Malströmsgalaxen som den kallas på svenska är en tjusig liten sak vid Karlavagnens handtag.

Den upptäcktes av astronomen Charles Messier den 13 oktober 1773 medan han studerade en komet.
Kometer var Messiers stora intresse och han förde bok över suddiga objekt som lätt kunde misstas för kometer men inte rörde sig. Just detta suddiga objekt fick nummer 51 i katalogen, som man i ytterligare drygt 150 år skulle tro främst listade gasmoln.
Åtta år senare, 1781 lyckades Messiers kollega Pierre Méchain se att det faktiskt var två moln alldeles intill varandra och 1845 såg astronomen Lord Rosse (William Parsons, den 3e earlen av Rosse) genom sitt teleskop, då världens största med en diameter på 1.8 meter, att ”molnet” var vackert spiralformat.

På Mount Wilson-observatoriet i USA, invigdes 1917 ett 2.5-meters teleskop som då tog över titeln som världens största. Det var genom detta som astronomen Edvin Hubble först 1929 kunde konstatera att det man länge trott var gasmoln i vår närhet, i många fall rörde sig om väldigt avlägsna galaxer som vår egen.

M51 ligger 23 miljoner ljusår från jorden och storleken är ungefär 3/4 av Vintergatan.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Basic success
Started	...
Astrometry.net job	3264290
PixInsight job	n/a
PixInsight queue size	n/a
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M51 - Whirlpool Galaxy

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