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As interstellar clouds approach the spiral arm region it helps them to begin the collapsing process and eventually form a star.

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What does two theories explain how the spiral arms are maintained?

Two primary theories explain how the spiral arms of galaxies are maintained: the density wave theory and the self-propagating star formation theory. The density wave theory posits that spiral arms are not made up of material but are instead regions of higher density that rotate around the galaxy, causing stars and gas to cluster and create the appearance of arms. The self-propagating star formation theory suggests that star formation occurs in waves, where the formation of new stars triggers further star formation in adjacent areas, leading to the development of spiral patterns over time. Both theories highlight the dynamic processes that contribute to the structure of spiral galaxies.


What is the type of galaxy that has a nucleus of bright stars with arms that circles around it?

All types of galaxies have a core with a high star density. All galaxies with "arms" are called Spiral Galaxies, of which there are sub-types related to the shape of the arms.


Where in a spiral galaxy is a new star found?

New stars are typically found in the spiral arms of a spiral galaxy. This is because the density of gas and dust is higher in the arms, creating the conditions necessary for star formation to occur. The gravitational forces within the spiral arms also play a role in triggering the collapse of gas clouds into new stars.


A galaxy with a bulge at its center and spiral arms?

This type of galaxy is categorized as a spiral galaxy. The bulge at the center contains older stars, while the spiral arms consist of younger stars and gas and dust regions where new star formation occurs. The Milky Way is an example of a galaxy with a bulge and spiral arms.


Where do most star formations take place?

In the spiral arms


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.


Where would you find the brightest part of a galaxy?

Most of the times, the brightest part of the galaxy is at the ceentre due the higher density of stars .Also if the galaxy is a spiral then the brightest part of the galaxy are the spiral arms because they are the star formation areas in the galaxy


What is the shape of a Spiral Galaxy?

Spiral galaxies are named for the (usually two armed) spiral structures that extend from the centre into the disk.The spiral arms are sites of ongoing star formation and are brighter than the surrounding disk because of the young, hot stars.See related link for a pictorial representation.


What are spiral density waves responsible for?

They initiate new star formation. Therefore they are responsible for the formation of new stars.


What does a spiral galaxy look like and how does its structure differ from other types of galaxies?

A spiral galaxy looks like a flat, rotating disk with spiral arms extending outwards from a central bulge. Its structure differs from other types of galaxies, like elliptical or irregular galaxies, because it has a defined disk shape with spiral arms, while other galaxies may have more irregular or rounded shapes.


What is a galaxy arms coming from the center like a pinwheel?

A galaxy with arms extending from its center like a pinwheel is typically classified as a spiral galaxy. These arms are regions of higher density where stars, gas, and dust are concentrated, often resulting in active star formation. The spiral structure is maintained by the galaxy's rotation and gravitational interactions, creating a dynamic and visually striking appearance. Prominent examples of spiral galaxies include the Milky Way and the Andromeda Galaxy.


Where are the ionization nebulae predominantly located?

Ionization nebulae are predominantly located within spiral galaxies, often in regions of active star formation such as in the arms and central regions of the galaxy. They are also commonly found around hot, massive stars that emit enough energy to ionize the surrounding gas.