Stars are amazing and beautiful they will show you amazing things and apsolutly Beautiful
Looking in from outside the Milky Way, we would see the luminous parts of the galaxy. A dense concentration of mostly old stars fills the central bulge, whose brightest stars are red giants of relatively low mass and big bluish stars recently born from gas held tightly around the galactic center (towards an object called Sagittarius A* that may be a black hole massing about 2.5 million suns). The central bulge actually extends in a 12-18,000 ly long "bar" (2-3 times longer than it is wide) to two to four bluish spiral arms on opposite sides that wrap around the bulge and each other outwards through the dimmer and redder galactic disk, possibly including broken arm segments, yellowish "ghost" arms where most short-lived OB stars have already perished, and spurs off the arms (for example, the Orion "arm" containing Sol may actually be a spur of the Perseus arm). Surrounding the Milky Way's spiral disk and bulge is the slightly flattened galactic halo of old stars, averaging somewhat lower in mass than our sun, including a relatively small number of individual stars and 200 or so globular clusters -- roughly half above and half below the disk.
Stars form when giant gas clouds start to clump together and collapse in upon themselves. This clumping is often caused by energy waves from nearby exploding supernovae. As they collapse, the molecules that form the clouds compress in upon each other to form helium and hydrogen. Once gravity pushes them together strongly enough, nuclear fission will begin to occur in the core of the star. This process will continue throughout the life of the star, until all of the fuel is used up.Stars with a large amount of mass will eventually become so unstable that they will explode in what is called a supernova; these stars eventually collapse upon themselves to form black holes. They are so much lager than our sun that we cannot imagine being on a planet in orbit of them. Check out the largest stars known at Space.com. Medium sized stars, like our Sun, grow larger as they shift from hydrogen building fission to helium building fussion and change color from yellow to red. They become Red Giants.
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