Nebulosity
21star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction either of two general types of stellar assemblages held… …
22Cygnus Loop — …
23Open cluster — Galactic cluster redirects here. See also galaxy groups and clusters NGC 265, an open star cluster in the Small Magellanic Cloud An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and… …
24Ring Nebula — For the Ring Nebula in Barnard s Galaxy, see Ring Nebula (NGC 6822). The Ring Nebula M57, The Ring Nebula. Credit: NASA/STScI/AURA …
25V838 Monocerotis — and its light echo as imaged by the Hubble Space Telescope on December 17, 2002. Credit: NASA/ESA Observation data Epoch 2000.0& …
26George Herbig — George Howard Herbig (born January 2 1920) is an astronomer at the University of Hawaii Institute for Astronomy.He received his Ph.D in 1948 at the University of California, Berkeley; his dissertation is entitled A Study of Variable Stars in… …
27Omega Nebula — Composite images obtained with the 3.58 metre NTT at La Silla Observatory. Credit: ESO Observation data: J2000 epoch …
28Messier 29 — M 29 open cluster, by Ole Nielsen Observation data (J2000.0 epoch) Constellation Cygnus …
29NGC 1435 — The Merope Nebula and surrounding nebulosity in Pleiades, taken by the Spitzer space telescope Observation data: J2000 epoch Type …
30Herbig-Haro object — Herbig Haro objects are small patches of nebulosity associated with newly born stars, and are formed when gas ejected by young stars collides with clouds of gas and dust nearby at speeds of several hundred kilometres per second. Herbig Haro… …
