What makes up a swirl galaxy?

youtube.com/watch?v=xNXw7hAhP7I An Interactive visualization on how our own Milky Way, a spiral galaxy, was made... The Milky Way Galaxy is a good example of a swirling galaxy. It consists of a large mass of stars drawn by gravitational forces into the form of a relatively flat disc. The disc is rotating, with the dense central body of stars moving at greater speeds than those towards the rim of the disc.As a result, the pattern of stars within the Galaxy as viewed from directly above or below the disc has formed into a spiral.

Because of localized gravitational variations, the spiral pattern has itself formed several distinct spiral arms that radiate outwards, where particularly large numbers of stars can be found. The Sagittarius Arm (also known as Sagittarius-Carina Arm) is one of four major spiral arms extending from and around the central hub region of the Milky Way Galaxy. The Sagittarius Arm is divided into two parts.

Curving outward from the galaxy's central bar is the Sagittarius bar, which further outward becomes the Carina arm. Sagittarius Arm's innermost end connects to one of the ends of this central bar, making it one of the two major spiral arms of the galaxy. Each spiral arm is a long, diffuse curving streamer of stars that radiates out from the galactic center.

These gigantic structures are often composed of billions of stars. The dense, inner arm of Sagittarius is located between the Scutum-Crux Arm and the Orion Arm. The Orion arm (also known as Carina-Cygnus arm) is marked as the Local Spur on the galactic map; it also contains our own Sun.

It is named for its proximity to the Sagittarius constellation as seen in the night sky from Earth, in the direction of the galactic center. More than a million galaxies have been counted so far. Galaxies in the universe had enormous range of properties, from the young and old, all the way to the big, small, luminous and faint.

Galaxies don't always form swirl shapes, our large spiral Milky Way galaxy is just one type of galaxy. The spiral arms are an optical illusion caused by dense hydrogen clouds that block out the radiation from stellar nurseries (were stars are born) in the spaces between the fingers of the galaxy. The black, dead areas are precisely where new stars are forming.

But, to better understand the dynamics of the swirling galaxy we can rely on the definition by "lessons.astrology. Com" on spiral arms: ---Quote--- These arms will cohere until the gas and dust has condensed into individual stars and these stars are dispersed throughout the galactic plane.In fact the whole sequence, if we could speed up the time process, would appear as a spinning pinwheel shedding sparks or stars as it whirls. The new-formed stars stay embedded within the spiral arm where they were born until galactic rotation forces them to migrate and be scattered through space, dissolving the spiral arms.

New arms are continually being formed. ---Quote---

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Our solar system is inside a galaxy. We live in a galaxy called the "Milky Way" (just like the candy bar! ).

There are many galaxies within the universe. Every galaxy is made up of stars, space dust, and gas. The combination can take on several unique shapes.

One such shape is a "spiral". The stars, dust, and gas swirl around in perfect spiral form. The spirals seem to be made up of "arms" that swirl around a central point.

Spiral galaxies are some of the most beautiful galaxies in space. Our own galaxy is spiral shaped! There are two theories about how galaxies are formed.

One theory is that swirling masses of space dust and gas collided and collapsed in the pull of gravity, coming together to form a galaxy. The other theory is that floating "clumps" of matter throughout the universe eventually met up with each other and formed galaxies. Large galaxies frequently "eat" smaller galaxies.

This means that when a smaller galaxy gets too close to a larger galaxy, the larger galaxy "sucks" the smaller galaxy in and the two become one. The Milky Way is in the process of eating a smaller neighbor galaxy right now!

One theory about the formation of spiral galaxies as opposed to ellipticals concerns the rate of star formation. If star formation is gradual, most of the galaxy's dust and gas will form a disk in the galaxy's rotational plane before stars form, and the resulting stars will also have a disk-shaped distribution. On the other hand, if star formation occurs before gravity and angular momentum can shape the protogalaxy into a disk, the distribution of stars will be more spherical, resulting in an elliptical galaxy.In addition, when galaxies collide, gravitational interactions randomize many of the stars' orbits, and the resulting merged galaxy often becomes elliptical in nature.

The origin of the spiral arms is a bit more problematic. They cannot be permanent features; differential rotation between the inner and outer parts of the galaxy would wind the arms into oblivion. Instead, it is believed that large-scale density waves ripple through the galactic disk.

Where the overall density increases, so does star formation, and the result is a spiral arm. Stars rotating around the galactic center alternately pass through and between spiral arms, and so the stars making up the spiral arms change over time.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.