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Mercury's year length is only 88 days compared to Earth's 365 days. that is a 277 day difference. Mercury's mass is 5 % more compared to Earth. Also the volume is 5% more compared to Earth's mass. Since Venus is near the sun it has a very thick atmosphere. the surface temp. can get up to 475 degress celsius. mercury venus Also Mercury's surface is like the moons but if you look at it closely it has fewer craters. also, it has heavily cratered regions. Venus's length of a year is 225 days. that is only a 140 day difference from Earth. Venus also has a thick atmosphere of carbon dioxide. Its atmosphere pressure at the surface is 90 times more than Earth's atmosphere. Earth is our home planet and the only planet that we can survive on. Mars is known as the home of the olympus mons, the largest volcano found in our solar system. Earth's average temperature is 59 degrees Fahrenheit. That is good for us because we have just the right temperature while other planets are too far from the sun so very cold or too close so very hot. On mars the year is twice as long as earth's year. it is 687 days. Also its day is a little over 24 hours so earth and mars are very alike. It is proven that if Earth lost its atmosphere it would look similar to mars. mars Dust storms cover much of mars for months at a time. Also both of the moons on mars is around 20 kilometers. Neptune was discovered in 1846 or over 150 years since that it still hasn't made a complete orbit around the sun because one year on that planet lasts 165 earth years. Uranus' axis is at a 97 degree angle so that is why its orbit is laying on its side. uranus blue color is because of a gas on the planet called methane. It is in the planet's upper atmosphere. uranus Uranus has bands of clouds that blow around rapidly but they are very faint. Neptune neptune is the fourth largest planet but heavier than uranus even though it is smaller. neptune's blue color is also the cause of a gas called methane just like its twin planet uranus. A day on jupiter lasts only 9 hours and 55 minutes. A year would not be very long. Saturn is the second biggest planet. It is also the lightest planet because if there was a bathtub big enough to hold Saturn it would float on water. SATURN HAS RINGS. it is also called the planetary rings. saturn has 59 moons. Jupiter Jupiter is 318 times bigger than earth. Also it is twice as massive as all the planets put together. jupiter's great red spot is thought to be a storm of swirling gas that has lasted for hundreds of years. THE SUN IS MADE OF GASES CONTAINING MATERIALS ON EARTH. THEY ARE HYDROGEN, HELIUM, CALCIUM, AND IRON. THE SUN CONTAINS 99.8% OF THE TOTAL MASS OF THE SOLAR SYSTEM. IF YOU WANTED TO DRIVE TO THE SUN AT 60 MILES PER HOUR IT WOULD TAKE 176 YEARS TO GET THERE. THE SUN IS 70% HYDROGEN AND 28% HELIUM EVERYTHING AMOUNTS UP TO ABOUT 2%.