Subtypes of Nebulae
Because sometimes you just need to know more stuff about the previously stated things.
Planetary Nebulae
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Planetary nebulae are a type of
emission nebulae, so they give off light naturally. These nebulae
consist of the cloud of ionized particles along with an expanding shell
of more ionized particles. They were named planetary nebulae, because
when viewing through a telescope they look like planets. These types of
nebulae come in all sorts of shapes, sizes and colors. One of the most
popular planetary nebulae is the Cat's eye nebula shown. |
Proto-Planetary Nebulae
| A proto-planetary nebula is
a young, growing nebula that will one day become a full planetary
nebula. These dust clouds are still getting food, generally some form
of matter, from the star that created it. Since they are still growing,
they come in a very wide variety of shapes and colors. The picture
shown is the aptly named Red Rectangle nebula. |
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Supernovae Remnants
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Also known as SNR's, these
clouds are essentially the left-overs of a supernova. They contains
very heavy elements, most of which are only created in supernovae
remnants. The picture is Tycho's Supernova Remnant. |