1. Our Solar System By : A.J.

2. Mercury Mercury is an inner planet. It is 35.98 million miles from the sun. It is 801 degrees F, a diameter of 3,032 miles, a mass of 0.06 of earths, is a rocky planet, and has no rings or moons. The composition of mercury’s atmosphere is small amounts of hydrogen, helium, oxygen, sodium, potassium, calcium, and magnesium. Two interesting facts about mercury are mercury is the smallest planet and has the most craters than any other planet in the solar system.

3. Pluto Pluto is an outer dwarf planet. Pluto is about 3.67 billion miles from the sun, - 380 degrees F, 1,485 miles in diameter, less than 0.005 mass of earth, a rocky planet, and 1 moon with no rings. The composition of Pluto’s atmosphere is 90% nitrogen and 10% other molecules. Two interesting facts about Pluto are Pluto is the second closest dwarf planet to the sun. Pluto also has been visited by a spacecraft.

4. Stars A Star is a point in the sky that is a large body like the sun. Stars are classified by their temperature and the element they absorb. The Sun

5. Comets, Meteors, Meteoroids, and Meteorites A comet is a large frozen object of gas and ice. Meteors are small broken of pieces of a comet or asteroid in earths atmosphere. Another name for a meteor is a shooting star. A meteorite is any part of a meteor that hits earth. Meteoroids are meteors out of earths atmosphere.

6. Gravity Gravity is the force that attracts a body towards the center of earth or any other body having mass. Gravity impacts humans because without gravity we would fly off earth into space. On different planets your weight will be different because of different amounts of gravity.

7. GPS Satellites There are 24 GPS Satellites in space. The first satellite was launched in 1978, and was originally made for military applications. In 1994, a total of 24 GPS satellites were in space. They help humans by giving directions to where you want to go and by Telling you where you are. GPS stands for Global Positioning System. GPS satellites are powered by solar power and have back up batteries.

8. Work Cited http://www.windows2universe.org/mercury/Atmosphere/atmosphere.html http://www.windows2universe.org/pluto/pluto_composition.html Houghton Mifflin Science. The atmosphere and beyond. Http://www.space.com/10915-space-technology-spinoffs-gps.html http://theplanets.org/pluto/