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Directed Reading A
Directed Reading A

... One explanation is that the moon was a separate body captured by Earth’s gravity. A second explanation is that the moon formed at the same time and from the same materials as the Earth. The third explanation is that the newly formed Earth was spinning so fast that a piece flew off and became the moo ...
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...  Unlike terrestrial planets, gas giants did not lose their original gases during formation.  All four gas giants have ring systems that are made of dust and icy debris that orbit the planets. Jupiter  Jupiter is the fifth planet from the sun.  Jupiter is the largest planet in the solar system a ...
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... • Pluto has one big moon called Charon. • We have not learned much about Pluto, because it is so far away. back ...
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... Exoplanets (Planets Orbiting Other Stars) • Prior to 1992, no planets outside our solar system had been discovered • To-date, over 1700 confirmed exoplanets have been discovered – In 2014, 715 new worlds were discovered by the Kepler Space Telescope – In April 2014, the Kepler team reported the sma ...
A Gravity Connection - Center for Space Research
A Gravity Connection - Center for Space Research

... orbiting another planet? What differences would there be in the relative surface gravity? Can you think of anything you have seen or read about that would lead you to believe the gravity is different there? (Students might mention pictures they have seen with the astronauts walking on the moon. The ...
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Solar_System_2013 Page 1

... We use this term when talking about the moon to say that it’s image is getting larger. A B C D ...
Gravitation - WordPress.com
Gravitation - WordPress.com

... acceleration a particle would experience if placed in that field. The magnitude is that of the freefall acceleration at that location. Part B of the figure shows the gravitational field vectors in a small region near the Earth’s surface.  The vectors are uniform in ...
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ES Apr 4 and 5 Test Review and Answers

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Ch. 5 - Mercury Venus Mars

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LESSON PLAN: National Geographic Magazine Archive

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The Inner Planets - sciencewithskinner

... Solar System Guided Notes The Outer Planets Section 27.2 There are four outer planets, Jupiter, Saturn, Uranus, and Neptune; and a minor planet Pluto. What is another name for the four outer planets? _______________ What five characteristics do each of the four outer planets have in common? 1. They ...
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ASTR 150

... • If fall perpendicular to spin axis Need to speed up resistance: centrifugal force • If fall parallel to spin axis: same speed, so no resistance forms protoplanetary disk swirling gas and dust raw material for planets – Origin of planet’s orbits! – Origin of Ecliptic plane – Organizes spins along i ...
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... The formation of our solar system (the Sun and nine planets) occurred the same way. The “protoplanet hypothesis” is a model for explaining the birth of solar systems. The process can be described in three steps: – 1. A cloud of gas and dust in space begins swirling. – 2. Most of the material (more t ...
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class16.ppt [Read-Only] - University of Texas Astronomy Home Page

... Our solar system formed by gravitational collapse of an interstellar cloud - called the solar nebula (Nebula is the Latin word for cloud) Kant and Laplace proposed this idea two centuries ago A large amount of evidence now supports this idea It implies that the planets formed together with the Sun, ...
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... But wisps of matter continued to orbit the early sun and the planets of our solar system were formed from them. Making the planets: The cloud of matter from which the sun formed was spinning, so it flattened out like pizza dough and the wisps of matter orbiting it spun around in a flat disk. Energiz ...
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Delivery of Lunar Meteorites to Earth. Brett Gladman, Joseph A

... which have either their perihelion or aphelion at the Earth's orbital radius because of approximate conservation of the Tisserand invariant. After several hundred thousand years, once the particles begin crossing the orbits of other planets, this behavior is disrupted. After 1 Myr, the surviving par ...
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Rotation vs. Revolution Throughout a 24 hour period, Earth will

... hours. There is a high tide on the side of the Earth facing the moon due to the moon’s gravity and on the side of the Earth directly opposite from the moon due to the inertia of the ocean waters. Approximately twice a month the Earth has a spring tide and a neap tide. ...
Venus - Overview Exploration of Venus Orbit and Rotation
Venus - Overview Exploration of Venus Orbit and Rotation

... Questions about Venus • Why is its rotation retrograde? Perhaps due to giant impact. • Why did Venus’ atmosphere evolve so differently than the Earth’s? Probably because conditions never arose for large amounts of liquid water oceans (too hot ...
Earth`s Internal Structure IV
Earth`s Internal Structure IV

... and about 560 feet deep). The crater was created approximately 50,000 years ago. ...
Lec – History4
Lec – History4

... - will be at rest - or moves at a constant speed, in straight line, forever Second Law (FF = ma) If a net force acts on an object: - it changes its motion (accelerates) - speeds up, slows down, or turns - depends on mass of object - more mass, harder to accelerate ...
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Earth's rotation



Earth's rotation is the rotation of the planet Earth around its own axis. The Earth rotates from the west towards east. As viewed from North Star or polestar Polaris, the Earth turns counter-clockwise.The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.The Earth rotates once in about 24 hours with respect to the sun and once every 23 hours 56 minutes and 4 seconds with respect to the stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern-day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds.
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