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Practice Exam #3
Practice Exam #3

... d. False. Actually, each star rises at the same time every day because the position of each star is fixed on the Celestial Sphere. 7. The diagram below shows one possible configuration of the Earth and Moon. The white sides of the circles represent the sides that are lit up by the sun, which is too ...
TTh HW06 key
TTh HW06 key

... far. Choose the correct response from those listed, along with at least a one (1) sentence justification for your answer. Alternate justification techniques include math calculations and labeled sketches. Each question is worth 5 points: 2 for the letter response and 3 for the justification. Collabo ...
Document
Document

... → (1) HZ very narrow and no CHZ (but 200 GYr not necessary) (2) HZ very close to the star → synchroneous rotation ...
2011_JCB_SS_Key_1_
2011_JCB_SS_Key_1_

... 24. If the Moon takes 27.3 days to complete one revolution around the Earth, why then does it take 29.5 days from one New Moon phase to another New Moon phase? In 27.3 days while the Moon was going around Earth, Earth was moving east in space around the Sun. The Moon must move another two days (29. ...
QUIZ 1 - AY5-S13 . . . . . . . . . . . . . . . . . YOUR NAME
QUIZ 1 - AY5-S13 . . . . . . . . . . . . . . . . . YOUR NAME

... 4. A source emits infrared radiation at a wavelength of 1060×10−9 m. What is the frequency of this ...
Saturn - Otterbein University
Saturn - Otterbein University

... – Predicted from observed perturbations of Uranus's orbit: Adams (1845) and Leverrier (1846) – Observed by Galle (1846) ...
Instructional Subunit on the Solar System
Instructional Subunit on the Solar System

... The subunit on the solar system is one of the Ohio standards in the 5th grade science curriculum. This topic is important to 5th grade instructors and students because there are usually several questions related to this topic on the 5th grade OAT. Students tend to have difficulty with the concept of ...
Lecture15-ASTA01 - University of Toronto
Lecture15-ASTA01 - University of Toronto

... • That is in agreement with the age of the Sun, which is estimated to be (5 +-1.5) Gyr • This has been calculated using mathematical models of the sun’s interior that are completely independent of meteorite radioactive ages. • Apparently, all the bodies of the solar system formed at about the same t ...
HW8 (due 4/3/14)
HW8 (due 4/3/14)

... 2. Give a specific example of a historical impact of an asteroid or comet that hit the Earth. Why are impact craters rare on the surface of Earth but plentiful on the Moon? 3. Three different things can happen when two continental plates meet. What is the name given to each, and briefly explain what ...
instructor notes: week 2
instructor notes: week 2

... 1. The orbits of the planets are ellipses with the Sun at one focus. Actually they are conic sections. 2. The line from the Sun to a planet sweeps out equal areas of orbit in equal time periods. 3. The orbital period of a planet is related to the semimajor axis of its orbit by P2 = a3 (Harmonic Law) ...
May 2016 - Pomona Valley Amateur Astronomers
May 2016 - Pomona Valley Amateur Astronomers

... In early June the planets Mars, Jupiter, and Saturn will all be near opposition. Early June also gives us the best chance of having a perfect night; that is a night with a dense marine layer to hold down the city lights and very steady seeing. Late summer might be better for steady seeing, but not f ...
1. Revisiting Kepler`s measurements Kepler`s first law states that the
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... So its average distance to the sun is the same as the length of its semimajor axis. From now on, the AU will refer to the length of the earth’s semimajor axis. It wasn’t until the 19th century that the AU was measured with any sort of remarkable accuracy. The most precise modern measurements put AU ...
The Earth`s Orbit and Season Demonstration
The Earth`s Orbit and Season Demonstration

... and Sagittarius. Have one student stand between the flashlight and the constellation Sagittarius holding the globe with the axis pointing towards the sun. This is the Earth position in summer. Note the following: 1. Due to the tilt of the earth the Northern Hemisphere day is much longer then its nig ...
Astronomy Rough Notes
Astronomy Rough Notes

... calculator. So to build a scale model of the TC and Chicago, you could use a pin head and a tic-tac separated by the width of a calculator. To include the Moon in this scale model, start with 1 m = 10 000 mi. The Moon would be 240 000 mi/10 000 mi or 24 m away, about on Hennepin Av from the classroo ...
Stars - Red, Blue, Old, New pt.3
Stars - Red, Blue, Old, New pt.3

... • While the He is being converted to C in the core, there is a zone of H to He fusion surrounding the core • When the core is all C, further changes occur and C to O fusion starts (with zones of He to C and H to He surrounding) • Stars get an “onion” structure ...
Life in the Universe
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... Small Solar System Bodies: all other objects except satellites. Strongest objections  school teachers and astrologers (and some US Astronomers)… ...
Lecture12
Lecture12

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Chapter 2 Discovering the Universe for Yourself
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... too small to notice with the naked eye 2. Earth does not orbit 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 far away Thus setting the stage for the long, historical s ...
Precession
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... a spot near the star Polaris. • Due to its rotation, Earth has a slight bulge around its middle – gravity from the sun and moon pull on the bulge twisting Earth on its axis. • The result is that the twisting of the axis of rotation combines with the rotation of the Earth causing precession. • Earth’ ...
26.9 news and views feature mx
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... Earth-like planet, perhaps harbouring life as we know it. What is a planet? Five planets, or ‘wandering stars’, were known to the ancients: Mercury, Venus, Mars, Jupiter and Saturn. The astronomical revolution brought about by Copernicus, Kepler and Newton showed that these objects were more akin to ...
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By: Kaylea Stone, Kalena Karp, Megan

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Simple astronomy within the solar system
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... particular star, as seen from two different points on the earth‘s surface, is eclipsed by the moon. To reduce the problems they make a number of simplifying assumptions: the moon and the star are located in the ecliptic (the plane of the sun and of the earth’s orbit); the star passes directly behind ...
Origin of the Solar System
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... populated by a few thousand planetesimals, such a system is invisible to telescopes ...
Lunar eclipses
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... • Ptolemy created a model of the universe that accounted for the movement of the planets. • Retrograde motion is the apparent westward motion of the planets with respect to the stars. ...
My planet project
My planet project

... Cool place Since first being discovered in 1930, by amateur American astronomer Clyde Tombaug, PLUTO is 2/3 the size of Earth’s Moon and known as the “Dwarf Planet: Pluto has one moon, Charon, which was discovered in 1978. The satellite may be a chunk that broke off Pluto in a collision with another ...
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Orrery



An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; but since accurate scaling is often not practical due to the actual large ratio differences, a subdued approximation may be used instead. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to Charles Boyle, 4th Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.
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