planetary - Physical Geology 101 37 Planetary Geology p...

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Physical Geology 101 1 37. Planetary Geology p. 656-679 The Solar System Revisited We will now apply all the information we have learned about the geology of the earth to other planetary bodies to see how similar, or different, they are to our planet. There are a total of _____ planets that comprise our solar system. Once the most distant planet from the Sun, Pluto is now relegated to the status _________________, and is 40 times further from the Sun than Earth, which we represent by the abbreviation 40 AU. An AU is an __________________________________(1 AU is the distance from the Earth to the Sun). At a distance of 30-50 AU is a wide ring of small icy bodies outside of the region of named planets. This part of the solar system is called the _____________________________. Even further out from here is the _________________________: an enormous collection of icy bodies that is the source of many comets. Other comets come from the Kuiper Belt. What Kuiper Belt object discovered in 2002 is over 1000 km in diameter? ____________________ Since then, several other distant solar system bodies have been discovered inside the Kuiper Belt, including one object discovered in 2005 and determined in April 2006 to be larger than Pluto. This object is now officially a dwarf planet named __________________. In 2004, a body was discovered orbiting the Sun outside the Kuiper Belt but inside the Oort Cloud, at about 90 AU. This body is slightly smaller than Pluto and is the most distant known body that orbits the Sun (once every 10,500 years). Its name is ____________________. More Kuiper Belt objects may be discovered in future that rival Pluto in size and may even be considered for designation as dwarf planets. All of the planets revolve around the Sun in the same direction. If we were to look down on the solar system from above its north pole, all the planets would be moving in a ___________________________ direction in approximately circular orbits around the Sun. The planets are all aligned within a flat imaginary plane, called the ________________________________. In contrast, _____________ has a highly elliptical orbit inclined at 17° to this plane, causing it to sometimes pass inside Neptune's orbit. When viewed from above, six of the planets rotate in a ____________________________ manner around their rotational axes. So, like Earth, on most planets, the Sun rises in the east and sets in the west. What two planets rotate in a clockwise manner? ___________________ and ____________________ One of the planets has somehow managed to roll over on its side with respect to the plane of the ecliptic. The northern hemisphere always faces the Sun and the southern hemisphere always faces away from it. What planet is this? _____________________
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Physical Geology 101 2 Between the orbits of Mars and Jupiter is a huge belt of rocks and debris called the ____________________. They owe their existence to Jupiter's large size and strong gravitational field which prevented early solar
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planetary - Physical Geology 101 37 Planetary Geology p...

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