What Are Nebulae?

Here Are Few good links 1. http://www.seds.org/messier/nabula.html 2. http://www.enchantedlearning.com/subjects/astronomy/stars/nabulae.shtml 3. http://www.noao.edu/jacoby/ You can also search in wikipedia

Nebulae is a huge clouds of dust and gas, nebulae are often the birthplace of stars. From the Latin word for clouds, the word "nebula" originally referred to distant galaxies, but today, the term is generally reserved for the dust and gas clouds that often harbor forming stars. The gas in nebulae is predominantly hydrogen, and the size of nebulae can range from one light-year across to several hundred. There are 2 primary types of nebulae: 1. Diffuse nebulae. These are the largest kind, and some have enough material to form 100,000 stars the size of the sun. Within this category are several kinds of nebulae, which includes: Emission Nebulae, Reflection Nebulae, Dark nebulae. 2. Planetary Nebulae. These types of nebulae are not related to planets, but got the name just because they resemble planets when viewed through a telescope.