astronomy_ibb

=**From The Big Bang To Galaxies**= Before the big bang there was a central point filled with all the energy in the universe. The pressure became too great and it exploded. It quickly expanded at the speed of light. After a few milliseconds quarks and antiquarks formed along with energy. As energy crashed together it made either a quark or antiquark, however when the antiquarks and quarks collided they created energy. Soon after that protons and electrons were created. After a couple seconds it became cool enough for electrons to orbit protons and neutrons. In the early universe clumps of matter and energy gathered and grew into stars. These stars formed rings. Inside these rings matter collided and formed planets. Around these planets moons formed from matter pulled in by gravity.

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= = = = =**History Of The Solar System**= The sun was created in a collection of interstellar gas and dust., It collected the mass around it soon collected and was pulled into a ring by its gravity. In the ring collections of mass called planetecimals formed. The planitesimals that formed farther out from the sun became large planets made of gas. The planets closer to the sun formed from planitecimals made out of harder materials like iron.. After that collections of mass around the planets formed into moons.

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=**Lives Of The Stars**= After the star is formed from clumps of matter. The clumps of matter are called cores. They gradually contracts and spins. The energy heats the core and provides it energy. The temperature spins faster as nuclear reactions go on inside the star. Solar winds created by the star clear away gas cloaking it.. The mass of the star and the color can tell you a lot about a star. The largest stars are blue, and the smaller stars are red.

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=**The Milky Way Galaxy**= At night you can see a line of stars, that is the milky way. It is about 100,00 light years across. On the opposite side of our galaxy another dwarf galaxy is merging with ours. Our galaxy has four spiral arms that rotate around the central bulge. The bulge is made up of many tightly packet stars. At the center there is most likely a super massive black hole. There is dark matter that we cannot see pulling on our galaxy. This dark matter causes spiral arms to form, and also causes our galaxy to rotate.

=**The Sun**= The sun is the closest star to earth. It is made up of hot gas. Most of it is hydrogen and the other part is helium. In the core is 15 million degrees. Hydrogen atoms crash together and turn into helium. This energy feeds the star. Jets of gas called spikials shoot up thousands of kilometers high.. In regions warped by the magnetic fields surrounding the sun, sun spots appear. These spots appear dark because they are cooler than the surrounding area. In reality these spots are still burning hot. The sun spots cycle through an 11 year period. At the beginning suns spots are few and form near the equator. Solar flares can blast atomic particles farther than the earth. Earths magnetic field protects us from these atomic particles. Few particles actually hit earth, and when they do they create the northern and southern lights.

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