Messier 99: Difference between revisions

Browse history interactively ← Previous edit Next edit →Content deleted Content addedVisual WikitextInline

Revision as of 12:07, 23 October 2006 editZaintoum (talk \| contribs)40 editsmNo edit summary← Previous edit		Revision as of 00:59, 19 November 2006 edit undoWilliamKF (talk \| contribs)Autopatrolled, Extended confirmed users, Pending changes reviewers8,422 editsm clean up using AWB Next edit →
Line 1:		Line 1:
	{{Galaxy		{{Galaxy
	\| name = Messier 99		\| name = ] 99
	<small>Spiral Galaxy Messier 99		<small>Spiral Galaxy Messier 99
	\| epoch = ]		\| epoch = ]
	\| type = SA(s)c: I		\| type = SA(s)c: I
	\| ra = 12<sup>h</sup> 18<sup>m</sup> 49.6<sup>s</sup>		\| ra = 12<sup>h</sup> 18<sup>m</sup> 49.6<sup>s</sup>
	\| dec = +14° 25' 01"		\| dec = +14° 25' 01"
	\| dist_ly = ] ]		\| dist_ly = ] ]
	\| z = +0.008036		\| z = +0.008036
	\| appmag_v = +9.7		\| appmag_v = +9.7
	\| size_v = 5.4' × 4.7'		\| size_v = 5′.4 × 4′.7
	\| constellation name = ]		\| constellation name = ]
		⚫	\| names = ] 4254,<br>'''''Coma Pinwheel Galaxy'''''
	\| radius_ly = ?
	\| absmag_v = 13
⚫	\| names = NGC 4254,<br>'''''Coma Pinwheel Galaxy'''''
	}}		}}

Line 31:		Line 29:
	*		*
	*		*
	<br>

	]		]
Line 38:		Line 35:
	]		]
	]		]
			]

⚫	{{galaxy-stub}}

	]		]
Line 48:		Line 44:
	]		]
	]		]


		⚫	{{galaxy-stub}}

Revision as of 00:59, 19 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
Structure	Active galactic nucleus Bar Bulge Central massive object Galactic Center Dark matter halo Disc Disc galaxy Halo corona Galactic plane Galactic ridge Interstellar medium Protogalaxy Galaxy filament Spiral arm Supermassive black hole Ultramassive
Active nuclei	Blazar LINER Markarian Quasar BL Lacertae object Radio X-shaped DRAGN Relativistic jet Seyfert
Energetic galaxies	Lyman-alpha emitter Lyman-break Luminous infrared ULIRG HLIRG ELIRG Starburst blue compact dwarf pea faint blue Luminous infrared galaxy Hot dust-obscured Green bean galaxy Hanny's Voorwerp Wolf-Rayet galaxy
Low activity	Low surface brightness Ultra diffuse Dark galaxy Red nugget Blue Nugget Dead disk
Interaction	Field Galactic tide Groups and clusters group cluster Brightest cluster galaxy fossil group Interacting merger collision cannibalism Jellyfish Satellite Stellar stream Superclusters Walls Voids and supervoids void galaxy
Lists	Galaxies Galaxies named after people Largest Nearest Polar-ring Ring Spiral Groups and clusters Large quasar groups Quasars List of the most distant astronomical objects Starburst galaxies Superclusters Voids
See also	Extragalactic astronomy Galactic astronomy Galactic coordinate system Galactic habitable zone Galactic magnetic fields Galactic orientation Galactic quadrant Galaxy color–magnitude diagram Galaxy formation and evolution Galaxy rotation curve Gravitational lens Gravitational microlensing Illustris project Intergalactic dust Intergalactic stars Intergalactic travel Population III stars Galaxy X (galaxy)
Category Portal

Messier 99 (also known as NGC 4254 or M99 for short, nicknamed Coma Pinwheel Galaxy) is a spiral galaxy approximately 60 million light-years away in the constellation Coma Berenices. It was discovered by Pierre Méchain on the 17th of march1781.

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.

External links

This galaxy-related article is a stub. You can help Misplaced Pages by expanding it.

Categories:

Revision as of 00:59, 19 November 2006

See also

External links