Density+in+our+Solar+System

//**Galaxy (LY) ﻿**//

 * Our galaxy is the Milky Way - 100,000 LY
 * Earth is 25,000 LY from the center of our galaxy
 * There is about 300 billion stars in our galaxy

//**Nebulae (LY)**//

 * ====about 10-100 LY====
 * ====Mostly clouds of gas and dust====
 * ====Produce 10-1,000 stars====
 * [[image:casey2.png caption="Nebulae - illustration by Savanah Hanna"]]

//**Solar System (AU)**//

 * ====A.U= Astronomical unit (distance sun -> earth)====
 * ====Stars are 98% of all the mass in the galaxy====
 * ====Other 2% is the "Junk" (asteriods,plants,moons, and comets)====
 * [[image:casey1.png caption="solar system - illustration by Savanah Hanna"]]

*Important: ﻿ Gravity causes formation by increasing density!*

- added by Mia Harris :) (sorry i would have added pictures but i couldn't figure it out)

//~Fixed all the spelling errors and missing notes// //& added illustrations of what we took in notes!~// //-Savanah Hanna// -Fixed some errors in quantities, Maria Barajas.