Information AboutNebula |
| CATEGORIES ABOUT NEBULA | |
| nebulae | |
| space plasmas | |
| plasma physics | |
| SHOPPER'S DELIGHT | |
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lies in a spiral arm of Galaxy M33 , 2.7 million light-years from Earth. This nebula is a region in which stars are forming.]] located about 8,000 Light Years away. This artificially colorized image was taken with the Wide Field And Planetary Camera 2 aboard NASA 's Hubble Space Telescope .]] A nebula () is an Interstellar Cloud of dust, gas and Plasma . Originally ''nebula'' was a general name for any extended Astronomical Object , including Galaxies beyond the Milky Way (some examples of the older usage survive; for example, the Andromeda Galaxy is sometimes referred to as the ''Andromeda Nebula''). CLASSIFICATION OF NEBULAE Nebulae can be classified by how they are illuminated:
ASTROPHYSICS OF NEBULAE H II regions are the Birthplace Of Stars . They are formed when very diffuse Molecular Cloud s begin to collapse under their own gravity, often due to the influence of a nearby Supernova explosion. The cloud collapses and fragments, forming sometimes hundreds of new stars. The newly-formed stars Ionize the surrounding gas to produce an emission nebula. Other nebulae are formed by the death of stars; a star that undergoes the transition to a White Dwarf blows off its outer layer to form a Planetary Nebula . Nova e and Supernova e can also create nebulae known as Nova Remnant s and Supernova Remnant s respectively. SEE ALSO |