Coordinates: 00 48 26, + 85 ° 15 '18 " image of Holmberg II. Holmberg II, also called Arp 268, UGC 4305 and DDO 50, is a relatively close and observable galaxy in the constellation Camelopardalis, in which a large amount of star formation is taking place.
It is 9.8 million light-years away in the M81 group. Holmberg II allows astronomers to study the birth of stars in an environment that is not disturbed by density waves (as in large galaxies such as the Milky Way) or the deformation caused by the pull of another galaxy, and which is conveniently close. Giant holes in the small galaxy - the largest about 5,500 light-years wide - are regions of old star formation. Waves of energy from mature stars and dying have melted the surrounding gas and dust, resulting in these large gaps, which have kept their shape, because there are no spiral arms or a massive nucleus to distort them.
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