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Datei:NGC 7250 - HST - Potw1717a.tif

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A matter of distance

In space, being outshone is an occupational hazard. This NASA/ESA Hubble Space Telescope image captures a galaxy named NGC 7250. Despite being remarkable in its own right — it has bright bursts of star formation and recorded supernova explosions— it blends into the background somewhat thanks to the gloriously bright star hogging the limelight next to it.

This bright object is a single and little-studied star named TYC 3203-450-1, located in the constellation of Lacerta (The Lizard), much closer than the much more distant galaxy. Only this way a normal star can outshine an entire galaxy, consisting of billions of stars. Astronomers studying distant objects call these stars “foreground stars” and they are often not very happy about them, as their bright light is contaminating the faint light from the more distant and interesting objects they actually want to study. In this case TYC 3203-450-1 million times closer than NGC 7250 which lies over 45 million light-years away from us. Would the star be the same distance as NGC 7250, it would hardly be visible in this image.

Credit:

ESA/Hubble & NASA 

Coordinates
Position (RA):	22 18 18.99
Position (Dec):	40° 33' 9.73"
Field of view:	2.71 x 2.71 arcminutes
Orientation:	North is 75.0° right of vertical

Colours & filters Band	Wavelength	Telescope
Optical Very Broad	350 nm	Hubble Space Telescope WFC3
Optical V	555 nm	Hubble Space Telescope WFC3
Infrared H	1.545 μm	Hubble Space Telescope WFC3
Optical I	814 nm	Hubble Space Telescope WFC3
.
Datum 24 April 2017, 06:00 (Release)
Quelle http://spacetelescope.org/images/Potw1717a/ http://spacetelescope.org/static/archives/images/original/Potw1717a.tif
Urheber ESA/Hubble and NASA
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aktuell18:49, 24. Apr. 2017Vorschaubild der Version vom 18:49, 24. Apr. 20174.104 × 4.104 (28,24 MB)Fabian RRRR{{Information |Description=A matter of distance In space, being outshone is an occupational hazard. This NASA/ESA Hubble Space Telescope image captures a galaxy named NGC 7250. Despite being remarkable in its own right — it has bright bursts of star...

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