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12 6 4 10 14 8 2 16 Saturn Neptune Jupiter Uranus
12 6 4 10 14 8 2 16 Saturn Neptune Jupiter Uranus

... Fold in half again so that planet Uranus lies over planet Neptune. Open out. ...
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... 57 times bigger than the Earth, but spins quite rapidly – one day lasts only 16 hours 7 minutes. Its average distance from the Sun is about 4,500 million km, and one year on Neptune lasts for almost 165 Earth years. It has an atmosphere of hydrogen, helium and methane. Its interior is made of ices, ...
Quick Reference - Objects in the skies
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... The Kuiper belt is a region of the Solar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, although it is far larger - 20 times as wide and 20 to 200 times as massive. Like the asteroid belt, it consists ...
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... A little about our most frequent targets: JUPITER The fifth planet from the Sun, Jupiter is the most massive planet in our solar system, and in composition it resembles a small star. In fact, if Jupiter had been between fifty and one hundred times more massive, it would have become a star rather than ...
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AST101 Lecture 16 Extra Solar Planets

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Chapter 2 - The Solar System

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PowerPoint

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... to initiate convective clouds. The relatively clear region where the Huygens probe landed in 2005 was far below this threshold. These clouds, which appear to be similar to terrestrial thunderstorms, can also produce centimeters to hundreds of centimeters of precipitation in only a few hours — suffic ...
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... Explore how the Earth's atmosphere exerts a pressure Examine how solar energy Describe astronomical units and that decreases with distance reaches Earth through radiation, light years as distances between above Earth's surface and that at mostly in the form of visible light. Earth, Sun and other sta ...
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Late Heavy Bombardment



The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.
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