astronomy_AJC

I am copying all my astronomy paragraph in here, i am adding a picture to go with each paragraph, i am making a title for each. =**Galaxies From the Beginning: A History of the Universe ** =

In the beginning all matter was concentrated at 1 point in a fraction of a second it expanded to the size of earth and then kept expanding at the speed of light. This was called the big bang In the beginning there we only quarks because it was to hot for atoms to form. The galaxy expanded and cooled down allowing hydrogen and helium to form. In the first 300,000 years only energy and no atoms.  =Galaxies and How They're Formed =

In the beginning all matter was concentrated at 1 point in a fraction of a second it expanded to the size of earth and then kept expanding at the speed of light. In the beginning there we only quarks because it was to hot for atoms to form. The galaxy expanded and cooled down allowing hydrogen and helium to form. In the first 300,000 years only energy and no atoms. =Galaxies and How They're Structured =

Galaxies are formed by matter clumping together. There are 3 different types of galaxies: elliptical, spiral, or irregular. When enough matter comes together it forms into a ball then is compressed by gravity and spread out. When the matter spreads out dark matter will sometimes pull it into spiral like arms making it a spiral galaxy.

=Planets and How They're Formed =

Planets formed from small planetesimals that were a couple kilometers across. Bigger planets formed where it was colder and smaller, rockier planets formed where it was hotter closer to the sun. planets closer to the sun were heated by radioactivity in there core as well as constant bombardment from planetiscimals. This caused the heavier metals like iron to sink to the core and lighter rock rose to the surface were it cooled and solidified.  =Moons, Rings, & Comets: How They're Made =

Moons were formed from planetesimals colliding slowly and fusing together. The earths moon was created from a planet the size of mars colliding with earth. Rings are formed when dust from broken planetiscimals is pulled into orbit or when planetiscimals are broken down. Commits are formed when planetiscimals from colder places away from the sun enter our solar system close to the sun.

