Hot stars. Active Universe

Hot stars. Active Universe

In this dramatic region of the southern Milky Way in the constellation Ara (the Altar) you can see blue hot stars, hydrogen gas glowing red, and dark clouds of dust.

About 4000 years from Earth, the stars on the left are young, massive and very energetic. Its intense ultraviolet radiation is wearing away the cloud complex of the nearby star, ionizing hydrogen gas and producing a reddish glow of "alpha hydrogen."

On the right, visible in conjunction with the dark dust nebula, is a small cluster of stars in formation. This beautiful color image is an image composition made with filters in blue, green and alpha hydrogen.

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Flaming StarEclipsing systems
Album: Photos of the Universe Gallery: Active Universe