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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.
What else can I help you with?
Where are nebulae located in spiral galaxies?
Nebulae are located within the spiral arms of spiral galaxies. These regions are areas of star formation where gas and dust clouds collide and condense, leading to the birth of new stars. The glowing gas and dust of nebulae can be seen as colorful patches within the spiral arms of galaxies like the Milky Way.
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
What do Lanes of young stars gas and dust that wind outward from the central region of spiral galaxies called?
The lanes of young stars, gas, and dust that wind outward from the central region of spiral galaxies are known as "spiral arms." These arms are regions of higher density where star formation is more active, often containing young, hot stars and nebulae. They are a defining feature of spiral galaxies and contribute to their overall structure and beauty.
What did the spiral galaxy remind Hubble of?
The spiral galaxy reminded Hubble of a "spiral nebula," leading to the realization that these spiral nebulae were actually distant galaxies outside of our Milky Way. This discovery fundamentally changed our understanding of the universe.
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.
