What is the difference between reflection nebulae and emission nebulae?

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A nebula is a region of interstellar gas and dust. Emission nebulae are clouds of ionized gas that allow red, blue, and violet light through. Generally, these nebulae appear reddish.
Reflection nebulae are clouds of dust that simply reflect light from nearby stars. The dust particles of reflection nebulae usually only scatter blue light, so the appearance is blue.
Other types of nebulae don't reflect light. Dark nebulae such as the Horsehead Nebula are so dense that they block light from other sources, such as background emission nebulae, reflection nebulae, or other stars.
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What is the difference between a star and nebula?

A nebula is an interstellar cloud of hydrogen, helium, plasma and dust. A star is a collection of matter, mostly hydrogen gas compressed to incredible pressure and heat

What is an emission nebula?

Emission Nebula is an ionized gas cloud that shines in variouscolors. Its ionization is from the high energy proton released byits neighboring star.

What is the difference between the crab nebula and the Orion nebula?

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What is the difference between a dark reflecting nebula and light relfecting nebula?

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