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... b. Explain how the impact of human activities on the can be understood through the analysis of interactions between the four Earth systems. c. Explain ozone depletion in the stratosphere and methods to slow human activities to reduce ozone depletion d. Explain the life cycle of a product from produc ...
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... Sir Arthur Stanley Eddington, 1926: The Internal Constitution of the Stars. Helioseismology uses the Sun’s natural oscillations to ‘pierce the outer layers’ and to observe beneath the surface of the Sun. Main oscillations: • g modes, internal gravity waves where buoyancy is the restoring force. Thes ...
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... last slide we used the term Meteoroids to describe objects in the sky, but your essential question and the standard say Meteor. ...
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... star is a ball of hot gases that gives off light and other forms of energy. Stars come in different sizes. The smallest stars are only about 20 km (about 12 mi) across. White dwarf stars are about the size of Earth. Supergiant stars can be more than 500 million km (about 300 million mi) wide. That i ...
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S T A R S

... The stars are named by use of the Greek alphabet. The brightest star in each constellation is named alpha followed by the constellation name. Then the next brightest star is called beta followed by the constellation name. Thus Sirius is the common name for the brightest star in the constellation of ...
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... motion of the Sun. The latter is exemplified by transitions between regular and more disordered motion modulated by the motions of the giant planets, and rare periods of retrograde motion with negative orbital angular momentum. An examination of the barycentric motion of exoplanet host stars, and th ...
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... 26. A It turned into carbon dioxide by reacting with nitrogen in Venus’s atmosphere. B It is frozen in craters near the poles. C Water was removed from the atmosphere by chemical reactions with surface rock. D Ultraviolet light split the water molecules, and the hyrdrogen then escaped to space. ...
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... units C and E. [1] 61 Describe one piece of evidence shown in the cross section that can be used to infer that rock unit A is younger than rock unit B. [1] 62 State the diameter of a particle normally found in rock unit B. ...
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... • Apparent magnitude is the brightness of an object as it appears to you • System due to Hipparchos (2nd century BC) • Nowadays system made more precise • Magnitude changes are “logarithmic”, each magnitude means factor of 2.512 in brightness • See Table 16.2 (p382) ...
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... • Apparent magnitude is the brightness of an object as it appears to you • System due to Hipparchos (2nd century BC) • Nowadays system made more precise • Magnitude changes are “logarithmic”, each magnitude means factor of 2.512 in brightness • See Table 16.2 (p382) ...
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... hydrogen in the center in 5Byr • Center of sun must shrink to get hotter to balance gravity • Sun will become a red giant. Surface expands. • Sun will become a planetary nebula • Sun will become a white dwarf ...
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... normal steps per meter. Teachers: Identify good “pacers” for the walk. 3. Make planet signs, attaching them to sticks or stiff wires for placing in the ground. Teachers: Assign each student or small group responsibility for a planet. If you have time, students can research their planets so they wil ...
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... a star we must: 1. Measure the apparent magnitude of the star. 2. Determine the distance of the star. The distance of a star may be calculated using trigonometry, if a very small angle called the parallax of the star can be measured. (The parallax is the annual, semi angular displacement of the star ...
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night sky a field guide to the heavens

... beyond all expectation, what could have been named that would be more marvelous than these things, or that nations beforehand would less venture to believe could be? Nothing, me thinks: so wonderous strange had been this sight. Yet how little, you know, wearied as all are to satiety with seeing, any ...
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... equally well with observations - the second hallmark - after medieval scholar William of Occam (1285 - 1349). For instance, original model of Copernicus (Sun-centered) did not match the data noticeably better than Ptolemy's model (Earth-centered). Thus, a purely data-driven judgment based on the thi ...
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... Radiants: This indicates the point/constellation in the sky where the meteors appear to start from. The peak rate usually occurs after the radiant has risen above the horizon. However, there is no need to look directly at the radiant as meteor travel out in all directions and can bee seen at a varie ...
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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 7011149597870700000♠149597870700 meters (about 150 million kilometers, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
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