When galaxies collide — a common event in theuniverse — a fresh burst of star formation typically ta
When galaxies collide — a common event in theuniverse — a fresh burst of star formation typically takes place as gas cloudsmash together. At this point, the galaxy has a blue hue, but the color does notmean it is cold: it is a result of the intense heat of newly formed blue–whitestars. Those stars do not last long, and after a few billion years the reddishhues of aging, smaller stars dominate an elliptical galaxy’s spectrum. Our Hubble Space Telescope (@NASAHubble) caughtsight of a soft, diffuse-looking galaxy, perhaps the aftermath of a long-agogalactic collision when two spiral galaxies, each perhaps much like the MilkyWay, swirled together for millions of years.In such mergers, the original galaxies are oftenstretched and pulled apart as they wrap around a common center of gravity.After a few back-and-forths, this starry tempest settles down into a new, roundobject. The now subdued celestial body is technically known as an ellipticalgalaxy.Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com. Credit: ESA/Hubble & NASA -- source link
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