Inner Solar System (Terrestrial Planets) Mercury Venus Earth Mars

Mercury Mercury Year = 88 Earth Days Mercury Day = 59 Earth Days http://antwrp.gsfc.nasa.gov/apod/image/9612/mercury2_mariner10_big.gif

Surface of Mercury Mercury has no atmosphere Water on Mercury? Possibly. Composition = Heavy Elements http://antwrp.gsfc.nasa.gov/apod/image/0002/merc4_m10_big.gif

Solar Energy Temperature = 662 to -274 degrees Fahrenheit http://antwrp.gsfc.nasa.gov/apod/image/9911/mercury_1600_trace.gif

Distance From Sun = 0.387 AU Distance From Sun = 0.387 AU Earth Mass = .055 Diameter = .383 Tilt = .5 Earth Mass = .055 Diameter = .383 Tilt = .5

Venus Venus Year = 225 Earth Days Venus Day = 243 Earth Days http://antwrp.gsfc.nasa.gov/apod/image/venus_galileo.gif

Surface of Venus Atmosphere Mostly Carbon Dioxide 3% Nitrogen Sulfuric Acid Droplets Composition = Heavy Elements http://antwrp.gsfc.nasa.gov/apod/image/0105/venus_greenbank_big.jpg

Solar Energy Temperature = 860 degrees Fahrenheit Water on Venus? NO (evaporated) http://antwrp.gsfc.nasa.gov/apod/image/maat_mons.gif

Distance From Sun = 0.723 AU Earth Mass = .815 Diameter = .949 Tilt = 177.3

Earth Earth Year = 365 days Earth Day = 24 hours http://antwrp.gsfc.nasa.gov/apod/ap010204.html

Surface of Earth Atmosphere 78% Nitrogen 21% Oxygen 1% Other Gases Composition = Heavy Elements http://antwrp.gsfc.nasa.gov/apod/ap980204.html

Solar Energy Temperature = 140 to -130 degrees Fahrenheit Water on Earth? Yes (liquid , solid, & gas) http://antwrp.gsfc.nasa.gov/apod/ap000131.html

Distance From Sun = 1 AU Earth Mass = 1 Diameter = 1 Tilt = 23.45

Mars Mars Year = 1.88 Earth Years Mars Day = 24.5 Earth Hours http://antwrp.gsfc.nasa.gov/apod/ap011017.html

Surface of Mars Atmosphere 95% Carbon Dioxide 5% Nitrogen Composition = Heavy Elements http://antwrp.gsfc.nasa.gov/apod/ap010721.html

Solar Energy Temperature = 70 to -220 degrees Fahrenheit Water on Mars? Yes (frozen) http://physics1.byu.edu/christensen/Physics%20127/Images/Mars.html

Distance From Sun = 1.524 AU Earth Mass = .107 Diameter = .553 Tilt = 25.19

Asteroid Belt Divides the Inner and Outer Planets http://antwrp.gsfc.nasa.gov/apod/ap010211.html