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Showing posts with label Horse- head. Show all posts
Showing posts with label Horse- head. Show all posts

Monday, June 11, 2012

Nebulae


The nebulae is more or less solid, evident or not from Earth. Nebulae can be found anywhere in the interstellar space. Before the invention of the telescope, the term nebula was applied to all celestial objects of diffuse appearance. As a result, many objects are now known to be star clusters of galaxies were called nebulae. Nebulae have been detected in almost all galaxies, including our own, the Milky Way. Depending on the age of stars associated, it can be classified into two groups: 1. - Associated evolved stars, such as planetary nebulae and supernova remnants. 2. - Associated with very young stars, some even still in the process of training, such as Herbig-Haro objects and molecular clouds.