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Before we realized the difference between galaxies and nebula, all the galaxies were called nebula.
Nebula now are realized to be vast clouds of interstellar hydrogen or other gasses, often light years in diameter. An example is the Orion Nebula, in the middle of the sword of the constellation of Orion. This nebula, some 1500 light years away, is a nursery for stars.
Galaxies, on the other hand, are vast seas of stars, millions to billions of light years away. Our galaxy is a barred spiral that contains 200 billion stars or more. Andromeda is our closest cousin (there are some smaller dwarf galaxies that are closer yet). It is a spiral galaxy 2.5 million light years away. Within some 15 billion light years in any direction one cares to look there are roughly 100 billion galaxies. That's quite a few.
Those galaxies also likely contain their own nebula. Our galaxy also contains many nebula--collections of gasses that have yet to coalesce into stars, or "planetary nebula" which are gasses blown off by stars during nova or supernova events.
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Where are nebulae located in spiral galaxies?
Nebulas could be located in any galaxy.
How do you know that spiral nebulae are part of the milky way?
The milky way is the spiral galaxy so spiral nebulae is its part.
What are the types or categories for galaxies?
Spiral galaxies, barred spiral galaxies, elliptical galaxies, and irregular galaxies
How many types of spiral galaxies are there?
Yes. There are two types of spiral galaxies: "S" (normal spiral) and the less common "SB" (barred spiral, with an elongated center).
How many galaxies are spiral?
Approximately 60% of all galaxies are spiral
What are similarities between elliptical and spiral galaxies?
While spiral galaxies are bright, elliptical galaxies are dim. Spiral galaxies are hotbeds of star formation, but elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born
How did the spiral galaxies get its name?
because it was spiral
What are the 3 common galaxies?
galaxie 1, 2, 3, 4 and 5
Spiral nebulae are part of the milky way?
the milky way is a spiral galaxy
How many barred spiral galaxies there?
It's not known to any degree of accuracy, but about 66% of all spiral galaxies are barred and about 60% of galaxies in the local Universe are spiral galaxies.
What are facts about spiral galaxies?
milky way is a spiral galaxy spiral galaxies have younger stars in the arm and older stars in the middle
What are 5 different galaxies?
spiral, eliptical, cartwheel, barred spiral, and lenticular galaxies
