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A fine example of an emission nebula is the Orion Nebula (M42). Reflection Nebula-A reflection nebula differs from an emission nebula in does not emit radiation of its own. It is a cloud of dust and gas that reflects the light energy from a nearby star or group of stars.Reflection nebulae are frequently the sites of star formation.hese colors are the result of different elements within the nebula. Most nebulae are composed of about 90% hydrogen, 10% helium, and 0.1% heavy elements such as carbon, nitrogen, magnesium, potassium, calcium, iron.
A nebula is a cloud of gas and dust in space. Some nebulae (more than one nebula) are regions where new stars are being formed, while others are the remains of dead or dying stars.Nebulae come in many different shapes and sizes.There are four main types of nebulae: planetary nebulae, reflection nebulae, emission nebulae, and absorption nebulae.The word nebula comes from the Latin word for cloud. 1  Javascript must be enabled to use Cool Cosmos.here are four main types of nebulae: planetary nebulae, reflection nebulae, emission nebulae, and absorption nebulae. The word nebula comes from the Latin word for cloud. 1  Javascript must be enabled to use Cool Cosmos.