The Stellar Nebula - Where a Star is Born ... Stellar Nebula Main Cycle Red Giant White Dwarf Supernova Black Hole ... The picture on the right, part of the Eagle Nebula, shows stars forming from clouds of gas and dust lingering in space. These clouds of particles, held together loosely by their own collective...
www.duke.edu/~teb/stars/nebula.html www.duke.edu/~teb/stars/nebula.html
Planetary nebula - Wikipedia, the free encyclopedia
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A planetary nebula is an emission nebula consisting of an expanding glowing shell of ionized gas and plasma ejected during the asymptotic giant branch (AGB) phase of certain types of stars late in t...
en.wikipedia.org/wiki/Planetary_nebula
The term "Nebula" has varied in the history of astronomy. In pre-telescopic times it was used to distinguish objects which look non-stellar from the pointlike stars. Most "nebulae" known at that time have been shown to be open star clusters.
www.maa.clell.de/Messier/nebula.html www.maa.clell.de/Messier/nebula.html
August 16, 1996 ; NGC 604: Giant Stellar Nursery in M33 ; Credit: H. Yang (UIUC), J. Hester (ASU), NASA ... Explanation: The nebula cataloged as NGC 604 is a giant star forming region, 1500 light years across, in the nearby spiral galaxy, M33. Seen here in a snapshot by the Hubble Space Telescope, over 200 newly formed,
antwrp.gsfc.nasa.gov/apod/ap960816.html
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November 9, 1999: This Hubble telescope image of the Trifid Nebula reveals a stellar nursery being torn apart by radiation from a nearby, massive star.
hubblesite.org/newscenter/archive/releases/1999/42/
Search all of HubbleSite ... THE FUTURE: WEBB TELESCOPE ... Search Picture Album...
hubblesite.org/gallery/album/entire_collection/pr199504... hubblesite.org/gallery/album/entire_collection/pr1995049b/
The stellar nursery in this case is the Carina Nebula - a cloud of gas and dust that is 200 light-years in diameter. Located in the southern part of our galaxy, Carina is 10,000 light-years from Earth.
www.space.com/scienceastronomy/050531_nebula_news.html www.space.com/scienceastronomy/050531_nebula_news.html
The planetary nebula has only a short life compared to the time scales in stellar evolution, being visible only a few thousands or 10,000s of years, and then fading out as its matter is spread in the cosmic environment, enriching the interstellar matter with carbon, oxygen, and other elements.
www.seds.org/messier/planetar.html