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A Closer Look at the Objects of our Solar System.

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Presentation on theme: "A Closer Look at the Objects of our Solar System."— Presentation transcript:

1 A Closer Look at the Objects of our Solar System

2 S1-4-08a Compare and contrast properties of the planets of our solar system. KEY WORDS M V E Mo J S U N P TerrestrialGas giants Asteroid BeltKuiper Belt

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4 Outer region of nebula: Gases (far from new Sun) begin to cool Cluster together and condense Forming the Gas Giants: Jupiter, Saturn, Uranus and Neptune Formation of our Solar System Matter recycled from past supernova explosions Nebula made mostly of hydrogen and helium Iron, rock and ice made up about 1% Gas Giants appear to lack solid surfaces, but the gases may become liquid or solid deeper towards their dense core

5 Inner region of nebula: Gases in the inner region too hot to condense Chunks of iron and rock collide and stick together Forming Terrestrial planets: Mercury, Venus, Earth and Mars Terrestrial planets are composed of rock, iron and hard elements through to the molten core

6 Nebula Attracted by gravity, clustered together hydrogen and helium Iron, rock and ice

7 Terrestrial planets (inner planets)

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9  Closest to the Sun Receives sunlight 10x brighter than Earth Day temperatures over 400°C  No atmosphere - so night temp fall to -180°C Day (rotation) – 59 Earth days Year (revolution) – 88 Earth days Mercury It rotates so slowly that its “year” is less than 2 “days” long

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11  3 rd brightest object in the sky CO 2 atmosphere traps heat (+ 465°C) Many volcanoes eject tonnes of sulphur  Clouds of sulphuric acid – makes acid rain Day (rotation) – 243 Earth days Year (revolution) – 225 Earth days Venus Sun and Moon are brightest objects Its “year” is shorter than its “day”

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13  Atmosphere (N 2, O 2, H 2 O) stabilizes temperature Ranges from -85°C to +65°C  Liquid water covers about 70% of surface Generally stable – some volcanoes, earthquakes Day (rotation) – 1 Earth days Year (revolution) – 365 1/4 Earth days Earth Distance from the Sun is most responsible for the factors that contribute to Earth’s ability to sustain life

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15  Bright red - iron oxide dirt makes it reddish Most studied planet (no signs of life… yet )  Of all planets, Mars is most like Earth Surface temp ranges from -120°C to +30°C Day (rotation) – 1 Earth day Year (revolution) – 687 Earth days Mars Although it is dry and barren now, scientists have evidence that may point to past glaciers and liquid water

16 An Asteroid Belt separates the Terrestrial planets from the Gas Giants – maybe remains of a totally smashed older planet

17 The Gas Giants (outer planets) Look at the shadow of a moon on the picture of Jupiter

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19  Largest of the planets (11x bigger than Earth). Has 63 moons (2006)  Great Red Spot is a continuous hurricane Temp around -160°C Day (rotation) – 10 Earth hours Year (revolution) – 11.9 Earth years Jupiter The coloured bands are gas clouds being streaked over the surface as it rotates quickly

20 3 moons and a shadow in this picture

21 2 nd largest of the planets  Least dense – may not have a solid core  Rings stretch from Earth to Moon 60 moons and 1000 rings (could be crushed moon) Day (rotation) – 11 Earth hours Year (revolution) – 29.5 Earth years Saturn Notice the coloured bands on the surface here too

22 Some kids on Earth didn’t know this photo was being taken when they were playing with laser pointers….

23  Rotates on its side Extremely cold -210°C  Has several narrow, dark rings Has 27 moons Day (rotation) – 17 Earth hours Year (revolution) – 84 Earth years Uranus It is now pronounced “ur-an-is” not “ur-anus”

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25 Only discovered because its gravity “tugs” on Uranus’s orbit causing changes  Blue and white – methane in atmosphere  The Great Dark Spot is a gigantic storm Extremely cold -220°C Day (rotation) – 16 Earth hours Year (revolution) – 165 Earth years Neptune Neptune has some faint rings too, and 20 moons

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27 Kuiper Belt disc-shaped region of thousands of icy objects Extends from Neptune to about 30 to 55 AU  Pluto and Eris are the best known dwarf planets even further - Oort Cloud (> 5000 AU) Pluto was reclassified as a dwarf planet in 2006

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29 Orbit is squished – it crosses Neptune and is sometimes closer to Sun  No atmosphere – not a Gas giant Extremely cold -220°C Has 3 moons! Day (rotation) – 6 Earth days Year (revolution) – 248 Earth years Pluto Astronomers have found objects bigger than Pluto orbiting the Sun

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31 CAN YOU ANSWER THESE QUESTIONS? S1-4-08a: How are the Gas Giants different from the Terrestrial planets? What is unique about each planet? KEY WORDS M V E Mo J S U N P TerrestrialGas giants Asteroid BeltKuiper Belt


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