OUR SOLAR SYSTEM BY ALLEE TURNER 1 Our

OUR SOLAR SYSTEM BY ALLEE TURNER 1. Our Solar System is 4. 6 billion years old. 2. The closer to the sun the hotter the planet is. 3. There are 100 billion solar systems in the milky way galaxy.

SUN o The sun is a star. o The sun can fit over one million earths inside it. o The sun is almost a perfect sphere.

MERCURY q. One year on Mercury is 88 days long. q. Mercury is the second hottest planet. q. Mercury is the smallest planet in the solar system.

VENUS v Venus is often called earths sister. v. A day on Venus is longer than a year. v. Venus rotates in the opposite direction to most planets.

EARTH ØEarth is the third planet from the sun. ØEarth is the fifth largest planet in our solar system. ØEarth is the only planet known for free oxygen.

MARS üMars is the fourth planet from the sun. üThe planet Mars is named after Mars the Roman god of war. üThe landmass of Mars and Earth are very similar.

THE ASTEROID BELT • The Asteroid Belt was discovered in 1801. • The Asteroid Belt is a disc shape. • The Asteroids are made of rock and metal.

JUPITER o Jupiter is the fastest spinning planet. o Jupiter has 67 moons. o Jupiter has the shortest day of all planets.

SATURN § Saturn has 62 moons. § Saturn has only been visited 4 times by spacecraft. § Saturn has rings.

URANUS q. Uranus was discovered by Sir William Herschel in 1781. q. Uranus makes one trip around the sun every 84 Earth years. q. Uranus is the coldest planet.

NEPTUNE v. It takes Neptune 164. 8 Earth years to orbit one time around the sun. v. Neptune was discovered by Jean Joseph Le Verrier. v. Neptune has the second largest gravity.