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Astro 1010 Planetary Astronomy Sample Questions for Exam 3
Astro 1010 Planetary Astronomy Sample Questions for Exam 3

... c) meteorites and meteoroids. d) moons and stars. ...
What causes eclipses?
What causes eclipses?

... 1.  Stars are so far away that stellar parallax is too small to notice with the naked eye. 2.  Earth does not orbit the Sun; it is the center of the universe. With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that ...
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Greek Astronomy - Galileo and Einstein

... Eudoxus placed all the fixed stars on a huge sphere, the earth itself a much smaller sphere fixed at the center. The huge sphere rotated about the earth once every twenty-four hours. So far, this is the standard “starry vault” picture. Then Eudoxus assumed the sun to be attached to another sphere, c ...
Homework, August 29, 2002 AST110-6
Homework, August 29, 2002 AST110-6

... b. Suppose you started driving from the Sun. How long would it take to reach Earth? How long would it take to reach Pluto? (You can find planetary distance data in Appendix E.) c. How long would it take to drive the 4.4 light-years to Alpha Centauri? ( Hint: Remember that 1 light-year is approximate ...
Solar System evolution from compositional mapping of the
Solar System evolution from compositional mapping of the

... the nebula, radial decay of material due to gas drag, sweeping resonances, and scattered embryos46,47. Individually, each mechanism was, however, insufficient, and even together, although many of these mechanisms could deplete, excite, and partially mix the belt, they could not adequately reproduce ...
Solar Noon
Solar Noon

... A star with planets and other objects in orbit around it; our solar system is made up of the Sun, eight planets, asteroids, meteoroids, comets, and other space objects. ...
Astronomy NJASK REview Packet
Astronomy NJASK REview Packet

... Astronomy NJASK Review Multiple Choice (1-25): Circle the best answer for each question below. ...
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Hydrosphere & Atmosphere

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Motions of the Earth, Moon and Sun

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Atmospheres in the Solar System • The speed at which molecules

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Jovian Planet Systems (Chapter 11) Jupiter and Saturn are mostly

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Volcanism in our Solar System

... volcanically active, in the past, displays the most recent large amount of activity, and we know this because of the cratering present everywhere else on the planets surface. This evidence shows how the volcanoes on the Tharsis bulge had been resurfacing the region and erasing the traces of past im ...
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History of Astronomy

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Astronomy 100 -- Worksheet #7 THE JOVIAN PLANETS 1) The

... 1) The Jovian planets, also called the _____________________, are _____________, _____________, _____________, and _____________. They are characterized by _____________ densities (like water), _____________ distances from the Sun, _____________ moons, cool _____________, and rapid _____________. Th ...
Final Study Guide
Final Study Guide

... 18. List the constituents of the electro-magnetic spectrum and discuss their relative wavelengths and energies. 19. Draw a labeled sketch of the three layers of the sun. 20. What can the doppler effect tell us about stars and galaxies? How does this work? 21. Compare and contrast elliptical galaxies ...
Chapter 2 Discovering the Universe for Yourself What does the
Chapter 2 Discovering the Universe for Yourself What does the

... lap another planet (or when Mercury or Venus laps us) •  But difficult to explain if you think that Earth is the center of the universe! •  In fact, ancients considered but rejected the correct explanation ...
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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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