Phantom Galaxy M74
by Science Source
Title
Phantom Galaxy M74
Artist
Science Source
Medium
Photograph - Photograph
Description
In the new Hubble Space Telescope image of the galaxy M74, the 'Phantom' Galaxy, we can also see a smattering of bright pink regions decorating the spiral arms. These are huge, relatively short-lived, clouds of hydrogen gas which glow due to the strong radiation from hot, young stars embedded within them; glowing pink regions of ionized hydrogen (hydrogen that has lost its electrons). These regions of star formation show an excess of light at ultraviolet wavelengths and astronomers call them HII regions.
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July 7th, 2014
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