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Datei:NGC 4388 - HST - Potw1649a.tif

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A transformation in Virgo

The constellation of Virgo (The Virgin) is especially rich in galaxies, due in part to the presence of a massive and gravitationally-bound collection of over 1300 galaxies called the Virgo Cluster. One particular member of this cosmic community, NGC 4388, is captured in this image, as seen by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 (WFC3).

Located some 60 million light-years away, NGC 4388 is experiencing some of the less desirable effects that come with belonging to such a massive galaxy cluster. It is undergoing a transformation, and has taken on a somewhat confused identity.

While the galaxy’s outskirts appear smooth and featureless, a classic feature of an elliptical galaxy, its centre displays remarkable dust lanes constrained within two symmetric spiral arms, which emerge from the galaxy’s glowing core — one of the obvious features of a spiral galaxy. Within the arms, speckles of bright blue mark the locations of young stars, indicating that NGC 4388 has hosted recent bursts of star formation. Despite the mixed messages, NGC 4388 is classified as a spiral galaxy. Its unusual combination of features are thought to have been caused by interactions between NGC 4388 and the Virgo Cluster. Gravitational interactions — from glancing blows to head-on collisions, tidal influencing, mergers, and galactic cannibalism — can be devastating to galaxies. While some may be lucky enough to simply suffer a distorted spiral arm or newly-triggered wave of star formation, others see their structure and contents completely and irrevocably altered.

Credit:

ESA/Hubble & NASA 

Coordinates
Position (RA): 	12 25 46.52
Position (Dec):	12° 39' 54.49"
Field of view: 	2.51 x 1.77 arcminutes
Orientation:   	North is 26.4° left of vertical

Colours & filters Band	Wavelength	Telescope
Optical           U	336 nm  	Hubble Space Telescope WFC3
Optical           B	438 nm  	Hubble Space Telescope WFC3
Optical           I	814 nm  	Hubble Space Telescope WFC3
Optical           B	438 nm  	Hubble Space Telescope WFC3
Optical           I	814 nm  	Hubble Space Telescope WFC3
.
Datum 5 December 2016, 6:00 (Release)
Quelle http://spacetelescope.org/images/potw1649a/ http://spacetelescope.org/static/archives/images/original/Potw1649a.tif
Urheber Credit: ESA/Hubble & NASA
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