Cosmology - Universe Paper

Cosmology is the study of the universe as a whole, and is how we know so much about our planet, solar system and the universe we live in. The ground work was laid by many of the brilliant minds throughout history, mainly physicists and astronomers. Early astronomers studied the stars and planet from Earth. The earliest advances were from greek minds, they were the first to try and learn about the world and space without supernatural explanations. They also used mathematics to help understand, which lead to how scientist study physics today. The most important piece that the greeks gave to modern science is the ability to reason from their observations. The groundwork that great minds like Galeleo and Newton played for us are the foundation of modern science. With the observations and their theories, scientist can now take these thoughts and build off of them through the use of our technology. Now using high powered telescopes and satellites, we can take they're thinking and use scientific processes to prove them.

For many great scientific minds in the past, the origin of the universe was a topic unfit for them to study. With advances in science, astronomers are now able to make studies and observations that help form the creation theories we have today, such as the Hubble telescope. This allowed for astronomers to notice the universe is expanding, which lead to the most popular theory, The Big Bang Theory. Most of the things we know about the Big Bang Theory we learned through our knowledge of physics. The theory successfully describes how expansion and cooling of this unimaginably intense mixture of particles and photons could have led to the present universe of stars and galaxies (Jeffery Bennet). The first part is particle creation, which happened because the universe was hot hot at the beginning that photons could transform themselves into matter, and vice versa.When photons crash together they can create two new particles. The second important part to the creation of the universe is force, mainly gravity and electromagnetism. Gravity is the most obvious force, that keeps everything together and moving. Electromagnetic force is stronger than gravity and depends on the charge of the particle. He discovery of the cosmic microwave background was announced in 1965 helped support the Big Bang Theory. Scientist studied microwave lengths and discovered they were left of radiation from the Big Bang.

The milky way is just of the many galaxies created in the Big Bang and just so happens to be where we live. Our galaxy is a spiral galaxy, and like all other spiral galaxies it spiral arms. From the side our galaxy would look like flat disk with the spiral arms and a bulge of stars in the middle of the disk. The entire galaxy is about 100,000 lightyears long in diameter, but only 1,000 lightyears thick. We learned about