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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 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.
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.
Where do most star formations take place?
In the spiral arms
What are spiral density waves responsible for?
They initiate new star formation. Therefore they are responsible for the formation of new stars.
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 were spiral galaxies deformed by?
A galaxy is a collection of stars. A spiral galaxy is in principle, a large flat disc with a bulging center, which is called the nucleus. In the nucleus, the largest quantity of stars are situated to the edge of the spiral-shape, and in the rest the amount of stars decreases. Within the disc the stars are situated on pinwheel-like structures, the spiral arms, that wind out in a spiral-shape from the nucleus to the edge. They are regions of dust, gas, and stars where star formation is occuring. Also in between the spiral arms reside stars, the stars in these areas give the galaxy its characteristic shape, because they are younger and much brighter.Sometimes a galaxy is deformed by the influence of gravity from within the galaxy or from an other galaxy in the neighborhood.Sometimes, galaxies crash into each other or due to gravity rip each other apart.Some spiral galaxies, when deformed, have a "bar" running through the galaxy nucleus. Usually the spiral arms "connect" to the end of this bar. The bars are active regions where star formation is occuring.
What galaxies are smaller with many bright young stars and lots of gas and dust for star formation?
Spiral Galaxies
Are elliptical galaxies egg-shaped galaxies without spiral arms of interstellar gas and dust?
Yes, that is correct. Elliptical galaxies are characterized by their elliptical or egg-shaped appearance and lack spiral arms of interstellar gas and dust. Unlike spiral galaxies, which have a flattened disk shape with spiral arms, elliptical galaxies have a more rounded or elongated shape. They are composed mainly of older stars and contain little to no ongoing star formation. Elliptical galaxies also tend to have less interstellar gas and dust compared to spiral galaxies.
Why are older stars located at the center of a spiral galaxy while younger stars make up arms of a spiral galaxy?
Older stars are generally towards the centre of a galaxy as they will be the first to accumulate around the galactic centre. Because they are older, there is less "free" hydrogen, so new star formation will occur wherever, there is enough matter to form a new star. This generally is around the outer edges of a galaxy.
Why are older stars located at the center of the spiral Galaxy while younger stars make up the arms of a spiral Galaxy?
Older stars are generally towards the centre of a galaxy as they will be the first to accumulate around the galactic centre. Because they are older, there is less "free" hydrogen, so new star formation will occur wherever, there is enough matter to form a new star. This generally is around the outer edges of a galaxy.
What are the arms of a spiral galaxy?
They are objects that are confined to the arms of a galaxy, i.e. objects that only exist within the spiral arms, and are not found (except very rarely) outside of spiral arms. Examples of tracers are structures to do with star formation, like for example open star clusters, giant molecular clouds or supernova remnants.
What is the milky way shaped like?
The milky way galaxy is a barred spiral shaped galaxy.
