A nebula , nebulae or nebulæ, with ligature or nebulas is an interstellar cloud of dust, hydrogen gas, helium gas and other ionized gases. 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 was referred to as the Andromeda Nebula).
Nebulae often form star-forming regions. In these regions the formations of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually will become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects.
There are some Notable named nebulae
Ant Nebula Barnard's Loop Boomerang Nebula Cat's Eye Nebula Crab Nebula Cone Nebula Eagle Nebula Egg Nebula Eskimo Nebula Eta Carinae Nebula Helix Nebula Kronberger 61 Lagoon Nebula | Hourglass Nebula Horsehead NebulaLagoon Nebula Omega Nebula Orion Nebula Pacman Nebula Pelican Nebula Red Square Nebula Red Rectangle Nebula Ring Nebula Rosette Nebula Tarantula Nebula Trifid Nebula |
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