What are the two main types of bright nebula?
Bright nebulae, also called diffuse or Galactic nebulae, occur in two main classes depending on their source of illumination: emission and reflection, although they occasionally are a combination of the two (R+E). Much less common is a third type of the bright nebula, the supernova remnant (SNR).
What is the difference between nebula and planetary nebula?
A nebula refers to clouds of dust and gas that lie between stars, in so-called interstellar space. A planetary nebula is a special type of nebula made when the outer layers of an old, giant star are thrown off into space.
What are the 4 nebulas?
The four types of nebulae are: emission, reflection, dark, and planetary. Primarily the birth place of stars, nebulae are clouds of gas and dust in space.
What is the lifespan of nebula?
about 10,000 years
These objects also have a short lifespan. The planetary nebula will only be around for about 10,000 years. As a result, there are only about 3,000 known planetary nebulae. Eventually, the central star that ionized the nebula cools down and (much later) becomes a black dwarf, and the nebula disappears from sight.
What are types of nebulae exist in the universe?
Classical types H II regions, large diffuse nebulae containing ionized hydrogen Planetary nebulae Supernova remnant (e.g., Crab Nebula) Dark nebula
What are the two different types of Nebula?
Types of Nebula Emission Nebula. Planetary nebula M57 (the Ring Nebula) in Lyra. Diffuse Nebulae. A deep-sky exposure of the Pleiades star cluster by amateur astronomer Robert Gendler. Reflection Nebulae. Reflection nebula IC2118, the Witch Head Nebula, in the Orion constellation. Planetary Nebulae. Supernova Remnant.
Why do different Nebulae have different colors?
Emission nebulae tend to be red in color because of the abundance of hydrogen . Additional colors, such as blue and green, can be produced by the atoms of other elements, but hydrogen is almost always the most abundant. A fine example of an emission nebula is the Orion Nebula (M42).
What are examples of nebulae?
All Nebula Types Emission Nebula Example: Omega Nebula Reflection Nebula Example: Iris Nebula Dark Nebula Example: Horsehead Nebula Planetary Nebula Example: Dumbbell Nebula Supernova Remnant Example: Veil Nebula