the planets mercury is the smallest terrestrial planet and the closest to the sun. during its day,...
TRANSCRIPT
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The Planets
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•Mercury is the smallest terrestrial planet and the closest to the Sun.
• During its day, Mercury is , 800° F.• Mercury’s night temperature is - 284° F.
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Mercury
Mercury travels very
fast around the sun,
Making one orbit in
88 days.
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Mercury has evidence of many impact events. The atmosphere is too thin to burn up meteors
before they strike the planet.
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Venus
Venus is about the same size as Earth, and at first glance appears much like Earth…
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…but Venus is very different from Earth in many ways:
• Venus’ atmosphere is 96% Carbon dioxide with clouds of sulphuric acid that start 50 km above the surface. The atmosphere is
90 times more dense than Earth’s.• The ground temperature is over 800°F.
• Venus rotates in the opposite direction as Earth.
• Venus takes 243 days to rotate on it’s axis.
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• This is a computer generated image from data collected by the Magellan space craft in 1991. The crater is 30 miles in diameter.
• Venus has many volcanoes like the one in the distance. Venus has over 1600 major volcanoes and thousands of minor ones.
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• This is a view of Venus’ surface taken before a Soviet lander succumbed to Venus’s hostile surface conditions.
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Venus is often only seen in transit across the Sun in the morning.
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Mars
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Mars is 1/3 the size of Earth but is similar in many ways.
• It’s day is almost the same length as a day on Earth, but it takes twice as long to revolve around the sun.
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Mars has seasons similar to those on Earth since Mars is tilted almost to the same degree as Earth.
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Mars also has…
…polar ice caps…Olympus Mons…Ancient River beds
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Mars may also have had life-forms at one time.
Scientists believe this rock sample from Mars shows fossils of ancient bacteria.
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• Much of our information from Mars is coming from Rovers launched to Mars in 2004.
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Between Mars and Jupiter is an asteroid belt. Mathematically in a place that another planet should be in.
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The Jovian planets(the Gas Giants)
The Gas Giants are very different from the terrestrial planets…
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Jupiter
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Jupiter, like the rest of the Jovian planets, is gaseous all the way to its core.
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Jupiter has four large moons and over 60 smaller moons. Pictured is Io, which has actively erupting volcanoes due to the stresses of the immense gravitational pull of Jupiter.
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Saturn
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Saturn, like all the Jovian planets, has rings made of ice and other particles.
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Saturn has at least 50 moons…
…Titan is one of the few moons in our Solar System with an atmosphere and evidence of large bodies of liquid.
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The tilt of Uranus’ axis is 98°,probably from a collision.
• Uranus
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Uranus has at least
15 known moons.
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Neptune is the first planet located
through a mathematical equation.
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• Neptune has storms that swirl around the planet like the other gas giants…
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…And rings.
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• Neptune’s moon, Triton, is unusual in that it has an atmosphere and actively erupting volcanoes.
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PLUTO AND BEYOND…
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Pluto
This image was taken from the
Hubble when Pluto was 2.6 billion
miles from Earth.
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• The next slide shows the planetoid Sedna, discovered beyond Pluto, in comparison with some other objects in our solar system.
• Until recently, Quaour was the only object thought to be beyond Pluto
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