The Sun The Sun is our Solar System’s star. It is about the size of 332,900 earth masses. It is a yellow dwarf star – medium sized. All the planets rotate around it and it rotates too. An au is the average distance from the sun to a planet. The sun is made up of gases hydrogen and helium and it is always hot. The sun is the source of light and heat so when it dies we die. Latest image of the far side of the Sun based on high resolution STEREO data, taken on February 2, 2011 at 23:56 UT when there was still a small gap between the STEREO Ahead and Behind data. Credit: NASA
INNER SOLAR SYSTEM Mercury, Venus, Earth, Mars and the asteroid belt compose the inner Solar System. They are closest to our Sun and called terrestrial planets mostly composed of rock and metal. What makes these planets inner planets are these four features:1.Tectonics2. Volcanism3. Impact craters4. Weathering and erosion
MERCURY Mercury is 0.4 au from the sun . It is the closest planet to the sun and the smallest planet in the solar system. Mercury does not have a moon.
VENUS Venus is 0.33 au from the sun. It is smaller than earth. It is the hottest planet. Venus does not have a moon and it spins backwards on it’s axis.
EARTH Earth is 1au from the sun and it only has one satellite, we call it the moon. It is the only planet with supporting life on it that we know of. Space objects burn up before hitting the Earth because Earth has an atmosphere. Earth is also called the “water planet” because it is the only planet with liquid water on it’s surface.
MARS Mars is 1.5 au from the sun. It possesses an atmosphere made up of mostly carbon dioxide. It has two moons Deimos and Phobos. It’s red color comes from iron oxide in its soil.
OUTER SOLAR SYSTEM It is home to the gas giants of Jupiter, Saturn, Uranus and Neptune. They’re mostly made of methane gas, helium, hydrogen. All outer planets have rings but only Saturn’s are visible.
JUPITER Jupiter is 5.2 au from the sun at 318 earth masses , it is 2.5 times the mass of other planets put together. It is the largest planet in the solar system. Jupiter is home to more than 64 moons. The four largest are Ganymede, Callisto, Lo and Europa. Jupiter has a red spot on it that scientist believe is a storm.
SATURN Saturn is 9.5 au from the sun it has several similarities to Jupiter such as its atmosphere and magnetosphere. Saturn has unique rings that are made of dust and ice crystals. Saturn has 62 moons two of which are Titan and Enceladus . Saturn is yellow, because there is a lot of sulphur in its atmosphere.
URANUS Uranus is 30 au from the sun at 14 earth masses it is the lightest planet in the outer region. It has a blue color because of methane gas. An odd fact about Uranus is that it "lays on its side". Its north and south poles are in the middle instead of on the top and on the bottom. Uranus has 27 moons . The largest are Titania, Oberon, Umbriel, Areiel, Miranda.
NEPTUNE Neptune is 30au from the sun and smaller than Uranus. It has 13 known moons. It’s biggest moon is Triton. Other moons are very small . It takes Neptune 165 years to rotate around the Sun.
PLUTO Pluto is not considered a planet anymore in fact it is now called a dwarf planet. It is not inhabited by any life. It has a moon that the scientist call Charon. It looks like Pluto and they orbit the same way, so they call it the double planet.
CONCLUSION The Solar System is the home of our Sun, planets and many smaller objects. It is located in the Milky Way galaxy which contains about 200 billion stars All planets names are derived from Greek or Roman mythology except our home - Earth. Following are the names and a brief meaning:Mercury Hermes god of commerceVenus Aphrodite goddess of loveEarth Gaia Old English/GermanicJupiter Zeus king of godsMars Ares god of warSaturn Cronus god of agricultureNeptune Poseidengod of the seaUranus Diety Of the heavensPluto Hades god of the underworld