Messier 99: Difference between revisions

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Revision as of 22:59, 23 November 2006 editGlen (talk \| contribs)Administrators27,228 editsm Reverted edits by Glen S (talk) to last version by 66.46.152.153← Previous edit		Revision as of 02:42, 26 November 2006 edit undoWilliamKF (talk \| contribs)Autopatrolled, Extended confirmed users, Pending changes reviewers8,422 edits cite nedNext edit →
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	<small>Spiral Galaxy Messier 99		<small>Spiral Galaxy Messier 99
	\| epoch = ]		\| epoch = ]
	\| type = SA(s)c: I		\| type = SA(s)c<ref name="ned">{{cite web
			\| title=NASA/IPAC Extragalactic Database
	\| ra = 12<sup>h</sup> 18<sup>m</sup> 49.6<sup>s</sup>
			\| work=Results for NGC 4254
	\| dec = +14° 25' 01"
			\| url=http://nedwww.ipac.caltech.edu/
⚫	\| dist_ly = ] ]
			\| accessdate=2006-11-25 }}</ref>
	\| z = +0.008036
			\| ra = {{RA\|12\|18\|49.6}}<ref name="ned" />
	\| appmag_v = +9.7
			\| dec = {{DEC\|+14\|24\|59}}<ref name="ned" />
⚫	\| size_v = 5′.4 × 4′.7
		⚫	\| dist_ly = ] ]{{fact}}
			\| z = 2407 ± 3 ]/]<ref name="ned" />
			\| appmag_v = 10.4<ref name="ned" />
		⚫	\| size_v = 5′.4 × 4′.7<ref name="ned" />
	\| constellation name = ]		\| constellation name = ]
	\| names = ] 4254,<br>~~'''''~~Coma Pinwheel Galaxy~~'''''~~		\| names = ] 4254,<ref name="ned" /> ] 7345,<ref name="ned" /> ] 39578,<ref name="ned" /><br>Coma Pinwheel Galaxy,<ref name="simbad">{{cite web
			\| title=SIMBAD Astronomical Database
			\| work=Results for NGC 4254
			\| url=http://simbad.u-strasbg.fr/Simbad
			\| accessdate=2006-11-25}}</ref> Virgo Cluster Pinwheel<ref name="simbad" />
	}}		}}

	'''Messier 99''' (also known as '''''NGC 4254''''' or '''''M99''''' for short, nicknamed '''''Coma Pinwheel Galaxy''''') is a ] approximately ] ]s away in the ] ]. It was discovered by ] on the ~~17th~~ of ~~march~~].		'''Messier 99''' (also known as '''''NGC 4254''''' or '''''M99''''' for short, nicknamed '''''Coma Pinwheel Galaxy''''') is an ] approximately ] ]s away in the ] ]. It was discovered by ] on the ] ].

	The galaxy has a normal looking arm and an extended arm that is less tightly wound. A bridge of neutral hydrogen gas links NGC 4254 with ]. The gravity from the ] ] appears to have distorted M99 and drawn out the gas bridge, as the two galaxy-sized objects have a close encounter, before they go their separate ways. It is expected that the drawn out arm will relax to match the normal arm once the encounter is over.		The galaxy has a normal looking arm and an extended arm that is less tightly wound. A bridge of neutral hydrogen gas links NGC 4254 with ]. The gravity from the ] ] appears to have distorted M99 and drawn out the gas bridge, as the two galaxy-sized objects have a close encounter, before they go their separate ways. It is expected that the drawn out arm will relax to match the normal arm once the encounter is over.
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			==References==

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Revision as of 02:42, 26 November 2006

v t e Galaxies
Morphology	Disc Lenticular barred unbarred Spiral anemic barred flocculent grand design intermediate Magellanic unbarred Dwarf galaxy elliptical irregular spheroidal spiral Elliptical galaxy cD Irregular barred Peculiar Ring Polar
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Messier 99 (also known as NGC 4254 or M99 for short, nicknamed Coma Pinwheel Galaxy) is an unbarred spiral galaxy approximately 60 million light-years away in the constellation Coma Berenices. It was discovered by Pierre Méchain on the March 17 1781.

The galaxy has a normal looking arm and an extended arm that is less tightly wound. A bridge of neutral hydrogen gas links NGC 4254 with VIRGOHI21. The gravity from the dark galaxy VIRGOHI21 appears to have distorted M99 and drawn out the gas bridge, as the two galaxy-sized objects have a close encounter, before they go their separate ways. It is expected that the drawn out arm will relax to match the normal arm once the encounter is over. Three supernovae have been observed in this galaxy.

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Revision as of 02:42, 26 November 2006

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