6. There is no atmosphere around MercuryAtmosphere- The gases surrounding our planet which includes the oxygen we breathe. http://www.wwu.edu/depts/skywise/a101_planets.html
7.
8. The amount of gases in Venus’s atmosphere makes Venus extremely hot.
33. Used to be the ninth planet from the Sun. http://news.cnet.com/pluto-is-a-planet-again-in-illinois/
34. Milky Way Milky Way view from ground on Earth Milky Way Galaxy from outside the Solar System http://www.utahskies.org/2009/01/07/1564/ http://www.thecommentfactory.com/interview-documentary-photographer-jim-richardson-on-meaning-technology-and-kansas-1867/
35.
36. Some can be as big as forty miles wide, some can be as small as a penny. http://www.odec.ca/projects/2008/wang8c2/regions/asteroid.htm
37.
38.
39. The comet tail is the part at the end of the comet. http://www.kidsastronomy.com/comets.htm