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PPT
PPT

... (4) The Sun appears to move west to east relative to stars (1 year cycle) Today the Sun is “in” a particular constellation, next month in a different one, etc. Sun’s path on the celestial sphere = ecliptic Constellations through which the ecliptic runs = ...
Actual Earth Motions
Actual Earth Motions

... ln the geocentric model, which motion would occur? ...
1. The planetary winds in Earth`s Northern Hemisphere generally
1. The planetary winds in Earth`s Northern Hemisphere generally

... 16. The diagram below shows Earth on a particular day in its orbit around the Sun. The dashed line represents Earth’s axis. ...
Chapter 23 Section 4 Minor Members of the Solar System
Chapter 23 Section 4 Minor Members of the Solar System

... In February 2001 an American spacecraft, NEAR Shoemaker, finished its mission in spectacular fashion—it became the first visitor to an asteroid. This historic accomplishment was not part of NEAR Shoemaker’s original goal, which was to orbit the asteroid, taking images and gathering data about these ...
The Solar System - Gordon College English Center
The Solar System - Gordon College English Center

... (2) A "dwarf planet" is a celestial body that: (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape2, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satel ...
Cub Scout Astronomer Badge What to do next… There`s still some
Cub Scout Astronomer Badge What to do next… There`s still some

... You will have: Found out that the North Star (Polaris) is an ordinary star in an interesting position. By using two stars at the end of the Plough (opposite the handle!) as pointers, you can find the North Star. Because it is almost directly above the North Pole it remains in the same place as the o ...
Tutorial: Motion
Tutorial: Motion

... another  Come to a consensus answer you both agree on  If you get stuck or are not sure of your answer ask another group  If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help ...
MINOR Members of the Solar System
MINOR Members of the Solar System

... been unsuccessful Based on erosion, the impact likely occurred within the last 20,000 years ...
Chapter 13 32)Which method could detect a planet in an orbit that is
Chapter 13 32)Which method could detect a planet in an orbit that is

... c) Astrometric method. The astrometric method measures the tangential motion of a star, and a face-on planetary orbit would force the star to move in the tangential direction. In contrast, both the Doppler and transit method require that the planet orbit partially edge on measure a radial velocity o ...
Lesson Plan - California Academy of Sciences
Lesson Plan - California Academy of Sciences

... light energy on Planet Earth. Here are some of the major ones with some suggestions on how to combat them. The best way to begin to overcome any misconception is to present a discrepant event or fact, something that surprises someone. Misconception #1: The Earth has seasons because its distance from ...
23.1 The Solar System
23.1 The Solar System

... Size is the most obvious difference between the terrestrial and the Jovian planets. The diameter of the largest terrestrial planet, Earth, is only one-quarter the diameter of the smallest Jovian planet, Neptune. Also, Earth’s mass is only 1/17 as great as Neptune’s. Hence, the Jovian planets are oft ...
The Constellations
The Constellations

... both the Earth and the other planets—apparent retrograde motion occurs when we pass the other planet in the orbit. This model place Earth and the other planets on two concentric circles with the Sun at the center, and is capable of making precise prediction on the position of the planets. Only two c ...
Common Misconceptions in Astronomy and History
Common Misconceptions in Astronomy and History

... Copernican model to solve correctly for the changes which Tycho Brahe had observed in the positional shifts of the planet Mars. Kepler used ellipses to explain the planetary motions, rather than circles, which Copernicus had retained in his theory, Tycho's data fit precisely with the orbital paramet ...
Powerpoint
Powerpoint

... Sun converts Hydrogen to Helium in its core (and only in its core) via the proton-proton chain (fusion) light takes up to a million years to make its way from the core to the surface fun fact: Helium was first discovered in the sun ...
Astronomy Syllabus - Jefferson Forest High School
Astronomy Syllabus - Jefferson Forest High School

... touch anything that is not yours or until instructed (including computers and equipment). Students will complete all work individually and on time. All homework is due when the tardy bell rings. If it is not turned in at that time, it is considered to be late. Work for other classes may NOT be compl ...
Astro 27 Solar System Formation and ExoPlanets Slide Show
Astro 27 Solar System Formation and ExoPlanets Slide Show

... cloud to initiate star formation of the sun, and seed the overdensity material uniformly with Al-26, which would decay within a few million year entirely into Mg-26. All consistent with observations. • Alternate ideas don’t work as well -- cosmic ray induced transformations of Ar40->Al-26->Mg-26 ove ...
Lecture 18: The Milky Way Galaxy
Lecture 18: The Milky Way Galaxy

... need better reference frame for other stars’ motion ...
Collapse of the Solar Nebula - Indiana University Astronomy
Collapse of the Solar Nebula - Indiana University Astronomy

... formation of planets in the solar nebula? (blue) It is another way of stating the temperature at which water freezes into ice. (red) It is the altitude in a planet's atmosphere at which snow can form. (yellow) It marks the special distance from the Sun at which hydrogen compounds become abundant; cl ...
Our Solar System
Our Solar System

... actually fought for the now accepted theory that we were the ones moving ...
History of Astronomy
History of Astronomy

...  The solstices (about June 21 and December 21) are when the Sun rises at the most extreme north and south points  The equinoxes (equal day and night and about March 21 and September 23) are when the Sun rises directly east  Ancients marked position of Sun rising and setting to determine the seaso ...
Solar
Solar

... • A solar eclipse happens when the moon passes between the Sun and the Earth • The corona is a million times fainter than the surface of the Sun so the only time it can be seen is during a total exlipse • Ancient people often thought that eclipses were signs from angry gods or omens of doom ...
Lecture8_v2 - Lick Observatory
Lecture8_v2 - Lick Observatory

... • The worlds come into being as follows: many bodies of all sorts and shapes move from the infinite into a great void; they come together there and produce a single whirl, in which, colliding with one another and revolving in all manner of ways, they begin to separate like to like. ...
The Discovery of Planets beyond the Solar System
The Discovery of Planets beyond the Solar System

What is Astronomy?
What is Astronomy?

... • The two points where the ecliptic intersects the celestial equator are known as equinoxes. On those dates, day and night are of equal duration. (The word equinox derives from the Latin for “equal night.”) In the fall (in Earth’s northern hemisphere), we have the autumnal equinox (on September 21). ...
Studying Space Section 2
Studying Space Section 2

... • Describe two lines of evidence for Earth’s rotation. • Explain how the change in apparent positions of constellations provides evidence of Earth’s rotation and revolution around the sun. • Summarize how Earth’s rotation and revolution provide a basis for measuring time. • Explain how the tilt of E ...
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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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