1. Nebulas Assembled by Ken Mitchell Livermore TOPScience A nebula) is an interstellar cloud of dust, hydrogen gas and plasma – resulting from the death of a star. It is also the first stage of a new star's life cycle.interstellar cloud dusthydrogenplasmastar's Ref: http://tinyurl.com/2g2kjm

2. The "Pillars of Creation" from the Eagle NebulaEagle Nebula

3. The Triangulum Emission Nebula NGC 604NGC 604

4. Vela Supernova Remnant

5. Mountains of Creation

6. The Flame Nebula, NGC 2024Flame Nebula

7. Some nebulae are formed as the result of supernova explosions, the death throes of massive, short-lived stars. The material thrown off from the supernova explosion is ionized by the supernova remnant. One of the best examples of this is the Crab Nebula, in Taurus. It is the result of a recorded supernova in the year 1054 and at the centre of the nebula is a neutron star, created during the explosion.supernova Crab NebulaTaurusneutron star Other nebulae may form as planetary nebulae. This is the final stage of a low-mass star's life, like Earth's Sun. Stars with a mass up to 8-10 solar masses evolve into red giants and slowly lose their outer layers during pulsations in their atmospheres. When a star has lost a sufficient amount of material, its temperature increases and the ultraviolet radiation it emits is capable of ionizing the surrounding nebula that it has thrown off.planetary nebulaeEarthSun Starsmass red giants ionizing

8. The Omega Nebula, an example of an emission nebula.Omega Nebulaemission nebula

9. The Horsehead Nebula, an example of a dark nebula.Horsehead Nebuladark nebula

10. The Pleiades. The diffuse nebulae near the stars are examples of reflection nebula.Pleiadesreflection nebula

11. The Cat's Eye Nebula, an example of a planetary nebula.Cat's Eye Nebula planetary nebula

12. Cat's Eye Hubble Remix

13. The Red Rectangle Nebula, an example of a protoplanetary nebula.Red Rectangle Nebula protoplanetary nebula

14. The Crab Nebula, an example of a supernova remnant.Crab Nebula supernova remnant

15. The Cat's Paw Nebula Red caused by ionize Hydrogen atoms.