Hubble reveals a river of star formation

Credit score: NASA, ESA, and J. Charlton (Pennsylvania State College); Picture processing: G. Kober (NASA Goddard/Catholic College of America)

This newly revised NASA Hubble House Telescope picture of the Hickson Compact Group 31 (HCG 31) of galaxies highlights streams of star-formation as 4 dwarf galaxies work together. The brilliant, distorted clump of younger blue-white stars (top-right of middle) is NGC 1741. Though it seems to be a single galaxy, NGC 1741 is definitely a pair of colliding dwarf galaxies. One other dwarf, cigar-shaped galaxy to the pair’s proper joins their dance with a skinny, blue stream of stars that connects the trio. HGC 31’s fourth member is revealed by a stream of younger blue stars that time to the galaxy (bottom-left of middle) and point out its interplay with the opposite three. The brilliant object within the middle of the picture is a star located between Earth and HCG 31.

Dwarf galaxy encounters are usually seen billions of light-years away, and subsequently occurred billions of years in the past, however HCG 31 is situated some 166 million light-years from Earth, comparatively shut by cosmic requirements. The newly revised picture emphasizes star-forming areas spurred by the quartet’s gravitational dance. The colour blue represents seen blue mild and showcases younger, scorching, blue stars, whereas the colour purple represents near-infrared mild.


Picture: Big elliptical galaxy UGC 10143


Extra info:
To view the 2010 launch of this picture, see Jurassic House: Historic Galaxies Come Collectively After Billions of Years

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