Fade between photoionised galaxies

This video cycles through eight Hubble images of eight different galaxies: the Teacup (more formally known as 2MASX J14302986+1339117), NGC 5972, 2MASX J15100402+0740370 and UGC 7342, and (from left to right on bottom row) NGC 5252, Mrk 1498, UGC 11185 and 2MASX J22014163+1151237.

In each of these eight images a quasar beam has caused once-invisible filaments in deep space to glow through a process called photoionisation. Oxygen, helium, nitrogen, sulphur and neon in the filaments absorb light from the quasar and slowly re-emit it over many thousands of years. Their unmistakable emerald hue is caused by ionised oxygen, which glows green.


NASA, ESA, W. Keel (University of Alabama, USA)

About the Video

Release date:2 April 2015, 17:00
Related releases:heic1507
Duration:40 s
Frame rate:30 fps

About the Object

Name:2MASX J14302986+1339117, Mrk 1498, NGC 5252, NGC 5972, SDSS J151004.01+074037.1, SDSS J220141.64+115124.3, Teacup Galaxy, UGC 11185, UGC 7342
Type:Local Universe : Galaxy : Activity : AGN : Quasar
Local Universe : Nebula : Appearance : Emission
Quasars and Black Holes



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