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.

Credit:

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

About the Video

Id:heic1507a
Release date:2 April 2015, 17:00
Related releases:heic1507
Duration:34 s

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
Category:HD
Nebulae
Quasars and Black Holes

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