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The solar system
- 1. The Solar System PROJECTBY BHAVANA
- 2. Introduction • A solarsystem consists of a star and objects that revolve around it. • Our Solar System consists of the Sun and nine known planets and the moons that orbit those planets. • The force of gravity keeps planets in orbit around the sun.
- 4. The Sun • Itis over one million times larger than Earth. • It is eight light minutes away from Earth or 92,957,000 miles. • The temperature is 15 million degrees K. One K = 13-25 million degrees!
- 5. The Nine KnownPlanets Inner Planets Outer Planets • Mercury • Venus • Earth • Mars • Jupiter • Saturn • Uranus • Neptune • Pluto
- 6. Mercury • Closest planetto the sun • Approximately half the size of Earth • Rocky surface covered by craters • No water or air results in unchanged appearance • Surface temperatures are hot enough to melt lead
- 7. Uranus • Seventh planet fromthe Sun • Four times larger in diameter than the Earth • Blue-green in color • The tilt of the axis causes sunlight for 42 years at a time
- 8. Venus • Second planetfrom the Sun • Approximately the same size as the Earth • Atmosphere consists of poisonous gases
- 9. Earth • Third planetfrom the Sun • Largest of the four inner planets • Only planet where life is known to exist • 70% of the surface is covered by water
- 10. Mars • Fourth planetfrom the Sun • Approximately half the size of Earth • Known as the Red Planet • Has four seasons similar to Earth • Resembles Earth more than any other planet
- 11. Jupiter • Fifth planetform the Sun • Largest planet in our Solar System • 1300 Earths could fit inside Jupiter • Doesn’t have a surface; made of gases
- 12. Saturn • Sixth planetfrom the Sun • Second largest planet • 800 Earths could fit inside Saturn • Thousands of rings are made up of ice and rock fragments
- 13. Neptune • Eighth planetform the Sun • Four times larger in diameter than the Earth • Blue in color
- 14. Pluto • Ninth planetfrom the Sun • Smallest of the planets • Coldest planet • But now it is not considered as a planet.
- 15. Let’s compare the planetsto Earth
- 16. A day on: Mercury = 3 Earth months Venus = 117 Earth days Mars = 41 minutes longer than an Earth day Jupiter = 10 Earth hours Saturn = 10 ½ Earth hours Uranus = 13 ½ Earth hours Neptune = 18 Earth hours Pluto = 7 Earth days
- 17. OUR SOLAR SYSTEM •Our solar system consists of: • 1 star , 8 planets, 63 (major) moons , asteroids, comets, meteoroids
- 18. The Orbital Speedof the Planets • Mercury = 30 miles per second • Venus = 22 miles per second • Earth = 19 miles per second • Mars = 15 miles per second • Jupiter = 8 miles per second • Saturn = 6 miles per second • Uranus = 4.2 miles per second • Neptune = 3.3 miles per second • Pluto = 2.9 miles per second Therefore, the further away from the Sun, the slower the orbital speed.
- 19. The Earth hasone Moon. How many moons do the other planets have? • Mercury - 0 • Venus - 0 • Mars - 2 • Jupiter - 17 • Saturn - 22 • Uranus - 15 • Neptune - 2 • Pluto - 1 • The Moon
- 20. It takes 365days for Earth to revolve around the Sun. How long does it take the other planets? • Mercury - 88 Earth days • Venus - 225 Earth days • Mars - about 2 Earth years • Jupiter - 11.8 Earth years • Saturn - 30 Earth years • Uranus - 84 Earth years • Neptune - 165 Earth years • Pluto - 248 Earth years
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