1. The Solar System

3. The Sun Size: 1.4 million km in diameter Rotation: 24.47 days Age: 4.5 billion years old (out of its 10 billion year lifetime) Temperature: 5,778 Kelvin Other Facts: about 1 million Earth’s would fit inside.

5. Mercury # from the Sun: 1 Type: Terrestrial Size: 1,516 miles in radius Distance from Sun: 35,980,000 miles Orbit: 88 days Revolution (length of day): 58d, 15h, 30m # of Moons: 0 Gravity: 3.7 m/s² Other Facts: has no atmosphere, only 2 nd hottest planet, smallest planet, most metal rich planet

7. Venus # from the Sun: 2 Type: Terrestrial Size: 3,760 miles in radius Distance from Sun: 67,240,000 miles Orbit: 224.7 days Rotation (Length of day): 116d, 18h, 0m # of Moons: 0 Gravity: 8.87 m/s² Other Facts: hottest planet, clockwise rotation, average temperature = 470 C or 880 F, most similar to Earth in size and density.

9. Earth # from the Sun: 3 Type: Terrestrial Size: 3,959 miles in radius Distance from Sun: 92,900,000 miles Orbit: 365 days Rotation: 24 hr # of Moons: 1 Gravity: 9.8 m/s² Other Facts: only planet in the solar system with water in all three states of matter on the surface.

11. Mars # from the Sun: 4 Type: Terrestrial Size: 2,106 miles in radius Distance from Sun: 141,600,000 miles Orbit: 687 days Rotation (length of day):1d, 0h, 40m # of Moons: 2; Phobos and Deimos Gravity: 3.711 m/s² Other Facts: 2 nd smallest planet, used to have liquid water 3 billion years ago, red color because of iron oxides

13. Asteroid Belt Distance from Sun: about 2.2 – 2.3 AUs Other Facts: – 1 AU thick – billions of asteroids – Most asteroids are the size of pebbles. – Ceres is a dwarf planet in the inner solar system in this asteroid belt.

15. Jupiter # from the Sun: 5 Type: Jovian (Gaseous) Size: 43,441 miles in radius Distance from Sun: 483,800,000 miles Orbit: 11.8618 years Rotation (length of day): 9h, 56m # of Moons: 28 included in 67 satellites; 4 largest: Io, Europa, Ganymede, Callisto Gravity: 24.79 m/s² Other Facts: Has the big red spot which is a giant hurricane that is 2-3 times the size of Earth.

17. Saturn # from the Sun: 6 Type: Jovian (gaseous) Size: 36,184 miles in radius Distance from Sun: 890,700,000 miles Orbit: 29.5 years Rotation (length of day): 10h 38m 25.4s # of Moons: 24 out of 150 satellites; 53 named, major moons: Dione, Tethys, Mimas, Enceladus, Rhea, Iapetus, and Titan Gravity: 10.44 m/s² Other Facts: Saturn’s rings extend from 6,630 km to 120,700 km above equator and is 20 m thick. Possible a new moon is forming on the outer most part of Saturn’s rings. Lowest density.

19. Uranus # from the Sun: 7 Type: Jovian (gaseous) Size: 15,759 miles in radius Distance from Sun: 1,787,000,000 miles Orbit: 84 years Rotation (length of day): 17h, 14m # of Moons: 21 out of 27 satellites, 5 major moons: Miranda, Ariel, Umbriel, Titania, Oberon Gravity: 8.69 m/s² Other Facts: rotates clockwise, is on 97.77° axial tilt, methane gives it it’s blue color. Also has rings like Saturn.

21. Neptune # from the Sun: 8 Type: Jovian (gaseous) Size: 15,299 miles in radius Distance from Sun: 2,798,000,000 miles Orbit: 165 years Rotation (length of day): 16h, 6m # of Moons: 8 moons of 14 satellites, largest is Triton Gravity: 11.15 m/s² Other Facts: has rings, but are too faint to see without a telescope.

23. Kuiper Asteroid Belt Distance from Sun: 2.5 to 4.5 billion miles Other Facts: – similar to the asteroid belt between Mars and Jupiter, although tend more to be icy rather than rocky. – Contains several dwarf planets, including Pluto, Sedna, Eris, Ceres, Haumea, Makemake