Mars

1. ** mars distance from the sun in (km) is 249,209,300 km ** 2. ** mars distance from the sun in (AU) is 1.665861 AU [1] ** 1. ** period ** **of revolution for mars in a day is 1.026** 2. ** period of revolution for mars ina year is 686.98[2] **
 * Distance from sun **
 * Period of revolution **

1. ** the rotation period in earth days is 1.026[3] ** 2. ** the rotatation period in earth years is 686.98 ** [4] 1. ** mars diameter in (km) is 6,790[5] **
 * Rotation period **
 * Diameter (km) **

1. ** The Earths diameter is 12750[6] ** 1. ** Mars has a thin atmosphere and it mostly made up of carbon dioxide. **
 * Diameter (Earths diameters) **
 * Atmosphere** **
 * Atmosphere** **
 * 2. The surface pressure on mars is 0.7% and thats the same as the pressure sea level on Earth. ****
 * 3. The atmosphere pressure changes over seaons because the temperature gets colder and the carbon dioxide freezes in the winter and on to the polar cap.[7]**
 * 4. When summer comes the carbon dioxide goes back in to the atmosphere.**
 * 5. mars has a lot of dust in the atmosphere and the winds occasionally create dust storms (Dust devils).** **


 * Number of Moons ****


 * 1. mars has 2 small moons.[8]**


 * 2. there names are Phobos and Deimos.** **


 * Number of rings ****


 * 1. mars doesn't have any dust rings** ** .[9]
 * other significant features **

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 * 1. It would take about 6 months to get to mars in a spacecraft but the crew would have to wait a year and a half before coming back home.[10]**
 * 2. Mars is half the size of the Earth[11]**
 * 3. mars is red because the soil is composed of iron oxide (rust).[12]****
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