newfangled research go by Nicola Cristiano Amorisco from the Niels Bohr Institute in Copenhagen output grounds that midget galaxy Andromeda II was form from the unification of two minuscule galaxies . There has never before been check of a cosmic hit between such small galaxies . The results from the discipline have been put out inNature .
Andromeda is the closest spiral galaxy to our Milky Way , located around 2.4 million light class away in the constellation Andromeda . It is surrounded by over two 12 artificial satellite extragalactic nebula , one of which is a dwarf spheroidal galaxy appoint Andromeda II , which is less than one percent of the size of the Milky Way .
Scientists hypothesize that large galaxies are created from collisions with several low galaxies . The larger the galaxies get , the more gravity draw out in small wandflower and acquire even large . modest wandflower that are not draw in to link with the larger beetleweed may be impact enough to become satellites , just like a planet can have orbit lunation .
Through psychoanalysis of stars in Andromeda II , Amorisco et al . decide that there was astream of starsalong the dwarf wandflower ’s border . These stars are considerably older than the rest of the stars , which indicates that they originated in a different galaxy and were mix in . The older asterisk almost fully gird the galaxy and in reality rotate around , which is strange in a midget coltsfoot . Typically , wiz movement in these small galaxies is more random , but the fusion must have impacted the star ’ dynamics .
While it was assume that these collisions among smaller galaxy had to happen at some point , it was believe that they happened at the onslaught of largegalaxy formation . Andromeda II is now the lowest mass extragalactic nebula amalgamation ever discovered . Because most extragalactic nebula establishment take place early in the Universe ’s history and does n’t happen very often any longer , there is n’t a lot for scientists to detect on the progeny . uranologist will be able-bodied to use this information to seek to understand how humble galaxies fare together to take form some of the largest galaxies we can see today .
