Spiral galaxies are galaxies that orbit the sun in the middle. Our galaxy the Milky Way is a spiral galaxy. Spiral galaxies are the most common type of galaxies, about 77% percent of the galaxies in the universe are spiral. If you can see the spiral shape it is called a “face on spiral” if you can see the side it is a “edge on spiral”. “Edge on spirals” you can see the central “bulge”. Some spiral galaxies have a bright line going through them these are called “barred spiral galaxies”.
Elliptical galaxies are thought to be formed if two spiral galaxies collide. Elliptical galaxies look like spiral galaxies center “bulge”. In these galaxies the stars are old and there is no gas there. Few new stars are known to start in an elliptical galaxy. Everything orbits around the “bulge” but they do this in random directions. The universes largest galaxies are elliptical some nearly 200 million light years long.
Irregular Galaxies are known to be misshapen and do not have a distinct form. The reason why they are misshaped is because they are in the influence of other galaxies which cause them to spread apart into weird shapes. They do not have a “bulge” or a known way of orbit. They are estimated to make up a quarter of all the galaxies in the universe.
http://cas.sdss.org/dr5/en/proj/basic/galaxies/spirals.asp
http://www.damtp.cam.ac.uk/research/gr/public/gal_class.html
http://science.nationalgeographic.com/science/space/universe/galaxies-article.html
http://www.absoluteastronomy.com/topics/Irregular_galaxy
Constellation Pro.
The Greeks originally recognized and named constellations. They named 48 total, many other cultures like the Arabians, Egyptians, and the Babylonians recognized these constellations also. The names of the constellations were Latin and the names given by the cultures listed were also translated into Latin. The constellations refer to mythological or legendary men, women, and animals. For thousands of years people used their knowledge of constellations to give them sort of a guide to help them find their way around.
(The Epic Bow)
The Epic Bow is a constellation that is a bow and arrow. It was once used by “O’ryan the Hunter”. O’ryan and the bow were the perfect match. When O’ryan went hunting with the bow he never missed. One day O’ryans village when into a drought and some people were beginning to starve. So it was up to O’ryan to go to the Great Forest so he could hunt and save his village. The Great Forest was on the distant planet Nebula. While there he had a great amount saved up of pounds of food that he had hunted. He decided that he need to take a rest before going back to his home planet, so he rested for many hours and when he woke up his food and bow was gone. So he went out for hours looking for it and eventually found it outside of a tent. He heard someone sleeping in the tent so he took the bow quickly and quietly careful so he would not wake up the strange person. But he started heading back to his camp and became curios. So he went back to the tent and looked in and the person grabbed him and pulled him in the tent and tied him up. When he was all tied up the person hit him in the head and O’ryan was knocked out cold. When he awoke the person turned out to be and evil witch. The witch explained that she was the one who put the curse on his planet and caused the drought. Then the witch explained how she was just about to go to his planet and kill every one. So she left while O’ryan was tied up. About an hour passed and O’ryan managed to finally break free from the rope. At once he got up took his bow and started to go back to his planet. While he was half way there he saw the witch heading toward his planet but she was way ahead of him. She was so far away he almost could not see her. He took his bow and shot it hit the witch but did not kill her. It did not kill her because she had a magic shield. She turned around and was furious. She was coming toward him fast, and O’ryan did not have any more arrows. So he thought as she got closer. He finally got the idea to take a star. He took a star and shot her right in the face. Then the curse broke and O’ryan and his bow were heroes. They were to be honored for thousands of years. So that they were always remembered they were both put next to each other in space to be constellations.
(The Epic Bow)
