Hubble image of 4 distant irregular blue galaxies

Hubble image of 4 distant irregular blue galaxies

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This image is part of the feature Hubble Sheds Light On The "Faint Blue Galaxy" Mystery


Caption: Faint blue galaxies. Hubble Space Telescope images of four irregular faint blue galaxies, the most common class of objects in the Universe. These galaxies are at a distance of between three billion and eight billion light years from Earth, and so are seen as they were at an early time in the life of the Universe. The blue areas denote intense star-forming activity. Many such galaxies have a wide range of shapes, unlike the spiral and elliptical galaxies common today. This suggests that the irregular galaxies have either faded or been destroyed by collisions and mergers over the last few billion years.

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Keywords: astronomy, blue, blue galaxy, cosmology, early galaxies, faint blue, faint blue galaxy, galactic, galaxies, galaxy, hst, hst image, hst post-servicing, irregular, irregular galaxy, science, universe

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