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The Solar System

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The Solar System 6th Grade Science 2011 ... (29 earth years) 33 moons Rings Uranus 7th planet 17.9 hours to rotate 30,688 days to revolve (84 earth years) ... – PowerPoint PPT presentation

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Title: The Solar System


1
The Solar System
  • 6th Grade Science
  • 2011

2
The Solar System
  • What do you know about the solar system?

3
What is a planet?
  • The definition of planet set in 2006 by the
    International Astronomical Union (IAU) states
    that in the Solar System a planet is a celestial
    body that
  • is in orbit around the Sun,
  • has sufficient mass to assume hydrostatic
    equilibrium (a nearly round shape), and
  • has "cleared the neighbourhood" around its orbit.

4
General Characteristics of the Solar System
  • Terrestrial planets- small, composed of rock and
    metallic elements (metals)
  • Jovian planets-
  • large,
  • composed of
  • gases and
  • frozen
  • compounds

5
4 Terrestrial PlanetsThe Inner Planets
  • Mercury, Venus, Earth, Mars
  • Rocky and metallic
  • Small
  • No rings Very few moons

6
Mercury
  • 1st planet
  • 58.6 earth days to rotate once
  • 88 earth days to revolve once
  • No moons
  • No rings
  • No
  • atmosphere

7
Venus
  • 2nd planet
  • 243 earth days to rotate once
  • 224.7 earth days to revolve once
  • No moons, rings
  • Atmosphere is mostly CO2

8
Earth
  • 3rd planet
  • 24 hours to rotate
  • 365 days to revolve
  • 1 moon
  • No rings

9
Mars
  • 4th planet
  • 24.6 hours to rotate
  • 687 days to revolve
  • 2 moons
  • No rings, atmosphere

10
The Asteroid Belt
  • Separates Inner and Outer planets
  • Asteroids are primordial objects left over from
    the formation of the Solar System. While some
    have suggested that they are the remains of a
    protoplanet that was destroyed in a massive
    collision long ago, the prevailing view is that
    asteroids are leftover rocky matter that never
    successfully coalesced into a planet.

11
4 Jovian PlanetsThe Outer Planets
  • Jupiter, Saturn, Uranus, Neptune
  • Gases frozen gases
  • Very large
  • All have rings
  • Many moons

12
Jupiter
  • 5th planet (1st outer planet)
  • 9.84 hours to rotate
  • 4,333 days to revolve
  • (12 earth years)
  • 63 moons
  • Rings
  • Largest
  • planet

13
Saturn
  • 6th planet
  • 10.2 hours to rotate
  • 10, 759 days to revolve (29 earth years)
  • 33 moons
  • Rings

14
Uranus
  • 7th planet
  • 17.9 hours to rotate
  • 30,688 days to revolve
  • (84 earth years)
  • 27 moons
  • Rings
  • Tilted on its side

15
Neptune
  • 8th planet
  • 19 hours to rotate
  • 60,181 days to revolve
  • (164.8 earth years)
  • 13 moons
  • Rings
  • Methane atmosphere
  • gives it bluish color

16
The Nine Planets
8
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune

17
Is Pluto a Planet?
  • Dwarf planet
  • From its time of discovery in 1930 to 2006 it was
    considered to be the ninth planet in the solar
    system, but because additional objects have been
    discovered including Eris which is 27 more
    massive, the IAU reclassified Pluto and the other
    objects as dwarf planets. The New Horizons
    spacecraft was launched on January 16, 2006 and
    will make its closest approach to Pluto on July
    14, 2015. This mission will provide an increased
    amount of information about this peculiar dwarf
    planet.

18
Pluto
  • Dwarf planet
  • 6 days, 9 hours to rotate
  • 90,470 days to revolve (247.7 earth years)

19
Dwarf Planets
20
Venus
21
moon
22
Jupiter
23
Saturn
24
Scaling the Solar System
  • not to scale
  • have to fit in picture

25
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26
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27
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28
Scale model of Planets compared to Sun
12.01in.
0.04in.
Mercury
0.10in.
Venus
0.12in
Earth
0.06in.
Mars
1.20in.
Jupiter
1.00in.
Saturn
0.40in.
Uranus
0.39in.
Neptune
0.02in.
Pluto
29
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30
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31
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32
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33
Distance
-not to scale -drawn to fit picture
34
The moon is 30 Earths away
35
Distance
Because space is so vast, astronomers have a
created different unit for measuring the
distances in space known as an astronomical
unit. This is the distance from the Sun to the
Earth.
  • Earth is 93million miles from Sun (150million km)
  • 1 AU (astronomical unit)

http//www.northern-stars.com/solar_system_distanc
e_scal.htm
36
AUs
  • Mercury .38
  • Venus- .72
  • Earth- 1.0
  • Mars- 1.5
  • Jupiter- 5.2
  • Saturn- 9.5
  • Uranus- 19.2
  • Neptune- 30.0
  • Pluto- 39.4
  • Scale solar system
  • 1AU 1m
  • (earth 1m away from sun)

37
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38
Rotation Revolution
39
General Characteristics of the Solar System
  • Planetary orbits and rotation
  • planet and satellite orbits are in a common plane
  • nearly all planet and satellite orbital and
    rotation motions are in the same direction

40
Planet and satellite orbits are in a common plane
  • common plane

41
Nearly all planet and satellite orbital and
rotation motions are in the same direction
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