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Asteroids • Small, rocky objects in orbit around the Sun. +
Asteroids • Small, rocky objects in orbit around the Sun. +

... Planetesimals contained only heavy elements. Growth stopped at Earth-sized planets. But continuing impacts with planetesimals altered the planets • Earth’s moon • Reversal of Venus’ rotation, etc. • Dumped much of atmospheres onto planets ...
Our Solar System
Our Solar System

... Asteroids and Other Objects in Our Solar System  Asteroids – rocks similar to that which ...
Part 2 - Hewlett
Part 2 - Hewlett

... 8. Which planet has a longer day than year? ____________________________________________ Saturn 9. Which planet would float in water (if you had a container large enough)? ____________________ 11 times larger 10. How many times larger is Jupiter than the Earth? ______________________________________ ...
NOVA COLLEGE-WIDE COURSE CONTENT SUMMARY PHY 150
NOVA COLLEGE-WIDE COURSE CONTENT SUMMARY PHY 150

... The Earth as a planet and its nearest neighbor, the Moon Atmospheric and geological characteristics of planets, moons and minor bodies of the solar system. The atmosphere and interior of the Sun. Sunspots and the solar cycle The characteristics of stars illustrated by the H-R diagram Stellar evoluti ...
C472 Continuous Assessment: Essay #2
C472 Continuous Assessment: Essay #2

... believed to have killed the dinosaurs on Earth, would likely destroy the more complex forms of life. In the case of the Earth, Jupiter is thought to have acted to remove the asteroids in this solar system, allowing for a reduced terrestrial collision rate which increased the opportunity for evolutio ...
Simple astronomy within the solar system
Simple astronomy within the solar system

... (a) If the northern observer notes a zenith angle of  = 7.2°, show that the radius of the earth is calculated to be 6.4 ∙ 108 cm. The two amateurs find that the second step necessary is to measure the velocity of the moon in its orbit about the center of the earth. They accomplish this indirectly b ...
Chapter27
Chapter27

... having such a limited discussion of life in the Universe was that I thought the subject was still very speculative. For example, at that time, only a little more than 10 years ago, we didn’t yet have any evidence for planetary systems orbiting ordinary stars other than the Sun. A lot has happened in ...
title of lesson plan - Discovery Education
title of lesson plan - Discovery Education

... 1. Describe the nine planets in the solar system. Compare and contrast the other planets with Earth. How are the four inner planets different from the five outer planets? 2. Explain the various technologies that astronomers use to study the planets and their moons. 3. Compare the use of robots and s ...
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–1– AST104 Sp2006: EXAM 1 Multiple Choice Questions: Mark the

... c. smaller than the orbit speed everywhere a. Special relativity explains deviations from d. smaller than the orbit speed when the Newton’s laws for very large velocities and Gen- planet is closest to the star but larger when the eral Relativity explains deviations from Newton’s planet is farthest f ...
september 2013 - Holt Planetarium
september 2013 - Holt Planetarium

... finally popped free of the heliosphere, the huge bubble of charged particles and magnetic fields that the sun puffs out around itself, on or around Aug. 25, 2012, becoming humanity's first envoy to the vast realms between the stars. Voyager 1 reached the boundary of the heliosphere in 2004, a milest ...
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... • On any given night, you can see about 3000 stars without a telescope, provided the sky is dark. ...
Friday Feb 25th, 2000
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Measuring the Distance to Stars Using Parallax
Measuring the Distance to Stars Using Parallax

... Notice from the pictures that astronomers measure the star’s position against background stars, first in December and again in June when the Earth is opposite from where it was 6 months ago. Now notice that the Earth in December to the star and back to the Earth in June makes an angle. It is this an ...
Pocket Almanac - California Academy of Sciences
Pocket Almanac - California Academy of Sciences

... On any given night, at least four to six sporadic meteors can be seen per hour as tiny particles of space dust burn up in Earth’s atmosphere. When Earth passes through the dust trail left behind by a passing comet, more of these particles rain through the atmosphere, causing a meteor shower. Showers ...
Conceptobasico.pdf
Conceptobasico.pdf

... At this time, the object is at its maximum altitude in the sky. The altazimuth coordinates of an object are local coordinates. Stars very far south near the South Celestial Pole do not rise at all, and they remain unseen for observers in the north. As the Earth orbits the Sun, we see the Sun moving ...
Star and Planet Formation Star and Planet - A
Star and Planet Formation Star and Planet - A

... 1.  If the Earth rotates around the Sun, birds should actually stay behind because of the movement of the Earth on its orbit. Inadequate understanding of physics ! 2.  If the Earth rotates around its axis (as required to explain day and night), things should fly off the spinning planet. Inadequate u ...
Earth Science
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... 9. Describe the Inflationary Model and draw the graph. 18. As the Earth orbits the Sun, what happens to the orientation of the Earth’s axis? 10. Match the following terms with their definitions. ___ Big Bang theory ___ steady-state theory ___ cosmic background radiation ___ inflationary universe A. ...
The Reason for Seasons - Somers Public Schools
The Reason for Seasons - Somers Public Schools

... summer solstice. At this time, the Northern Hemisphere is tilted directly towards the Sun. It is the first day of summer. It is the longest period of daylight. The Southern Hemisphere is tilted directly away from the Sun at this time, so it is the first day of winter. Around December 21, Earth reach ...
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... summer solstice. At this time, the Northern Hemisphere is tilted directly towards the Sun. It is the first day of summer. It is the longest period of daylight. The Southern Hemisphere is tilted directly away from the Sun at this time, so it is the first day of winter. Around December 21, Earth reach ...
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... the Sun, all in the same direction, and all in roughly the same plane (i.e. it's like they are all laid out on a large dinner plate with the Sun at the center). The outer planets orbit more slowly than the inner planets. 4. The stars appear stationary. (They do, in fact, move very quickly. But they ...
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Revision sheet Q3

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Power Point Version

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Monday, March 31 - Otterbein University
Monday, March 31 - Otterbein University

... Atmospheric Histories - Venus • Venus is closer to Sun than Earth hotter surface • Not a lot of liquid water on surface initially • CO2 could not be absorbed by water, rocks because of higher temperatures •  run-away Greenhouse effect: it’s hot, the greenhouse gases can’t be be stored away, it ge ...
What is Astronomy?
What is Astronomy?

... 1. Find a hill that gives you a clear view of the ocean horizon in opposite directions (a peninsula) with a pointed rock at the top. Ideally the hill should be between 100 and 1000 feet above sea level. 2. Mount the meterstick upright about 15 ft. from the pointed rock. Measure this distance exactly ...
Solar System Information
Solar System Information

... •Discovered on January 1, 1801, by Giuseppe Piazzi •Was classified as the 8th planet for half a century ...
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Geocentric model



In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a description of the cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece including the noteworthy systems of Aristotle (see Aristotelian physics) and Ptolemy. As such, they believed that the Sun, Moon, stars, and naked eye planets circled Earth.Two commonly made observations supported the idea that Earth was the center of the Universe. The stars, the sun, and planets appear to revolve around Earth each day, making Earth the center of that system. The stars were thought to be on a celestial sphere, with the earth at its center, that rotated each day, using a line through the north and south pole as an axis. The stars closest to the equator appeared to rise and fall the greatest distance, but each star circled back to its rising point each day. The second observation supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth-bound observer, and that it is solid, stable, and unmoving.Ancient Roman and medieval philosophers usually combined the geocentric model with a spherical Earth. It is not the same as the older flat Earth model implied in some mythology, as was the case with the biblical and postbiblical Latin cosmology. The ancient Jewish Babylonian uranography pictured a flat Earth with a dome-shaped rigid canopy named firmament placed over it. (רקיע- rāqîa').However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in Western culture until the 17th century through the synthesis of theories by Copernicus and Kepler.The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological and astronomical charts for over 1500 years. The geocentric model held sway into the early modern age, but from the late 16th century onward was gradually superseded by the heliocentric model of Copernicus, Galileo and Kepler. There was much resistance to the transition between these two theories. Christian theologians were reluctant to reject a theory that agreed with Bible passages (e.g. ""Sun, stand you still upon Gibeon"", Joshua 10:12 – King James 2000 Bible). Others felt a new, unknown theory could not subvert an accepted consensus for geocentrism.
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