Some of these cracks have created cliffs that are thought to be the product of planetary shrinkage, which may have happened early in Mercury's history when the core cooled and rather rapidly. Mercury has no moon. Venus (The goddess of Love) Venus is the second largest planet within the inner solar system and second from the sun at ...
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Venus is composed of rock and metal with an average temperature of 850o F. This is due to the greenhouse effect produced by an over abundance of carbon dioxide in its atmosphere. The atmosphere on Venus has no oxygen and the pressure of its atmosphere is nine times that of Earth's at ground level...
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Asteroids, Meteorites & The Solar System Asteroids are massive lumps of rock that orbit the Sun. They can be anything up to 1000 kilometers wide and are sometimes described as minor planets. Most asteroids in the Solar System lie in a belt - the Asteroid Belt - orbiting the Sun between Mars and Jupiter, but some are orbiting relatively nearby...	1 / 266
Solar System Mars takes twice as long to orbit the sun than Earth. Its day's length is almost the same as Earth's. Jupiter is the next planet. It is the largest planet of all the planets...	4 / 894
The Solar System The geologic activity that we are familiar with on Earth seems not to exist on Venus, except for the presence two volcanoes along a fault line. 4.2 Atmosphere Venus’s veil of mystery is really an impenetrable, heavy layer of sulfuric acid clouds above an atmosphere consisting of about 96 percent carbon dioxide...	7 / 1853
Solar System Comprised predominantly of iron and silicates, the Earth also contained small amounts of radioactive elements, mostly uranium, thorium, and potassium. As these elements decayed, they produced radiation that gradually heated the Earth, melting the iron and silicates...	8 / 1965
Earth and Our Solar System This build up of new ground creates shield volcanoes and strato-volcanoes. A second geological process that affects rocky terrestrials is impact cratering...	5 / 1272