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ganycal
ganycal

... Ganymede and Callisto some 3.8 billion years ago can explain their vastly different surfaces and interior states, An article descrbing the according to research by scidifferences in Jupiter’s entists at Southwest Research large moons Ganymede Institute appearing in Nature and Callisto was the Geosci ...
Understanding Stars
Understanding Stars

... Try to distribute the work so each group member is responsible for one star – and if you have more stars than group members, feel free to leave off any extra stars. The values for the Sun are given in the first row for reference. ...
lecture3
lecture3

... • What is the cause of the seasons on Earth? • As the Earth orbits the sun, the tilt of the axis causes different portions of the Earth to receive more or less direct sunlight at different times of year. The two hemispheres have opposite seasons. The summer solstice is the time when the northern hem ...
Chap4-Timing
Chap4-Timing

...  Fate of planetary systems during the red giant phase.  All planets within the final extent of the red giant envelope will be engulfed and migrate inwards.  Planets further out will have greater chance of survival, migrating outwards as mass is lost from central star.  In mass is loss instantane ...
Let`s PLAN IT--Getting Your System in Order
Let`s PLAN IT--Getting Your System in Order

... The Sun ..............................................................................................................................................17 Formation of the Solar System .......................................................................................................18 Introductio ...
Star Map - Science Centre
Star Map - Science Centre

What, and Why, is the International Astronomical Union?
What, and Why, is the International Astronomical Union?

... The formal structure evolved in Brussels and signed into effect in Rome consisted of Standing Committees “for the study of various branches of astronomy, encouragement of collective investigations, and discussion of questions requiring international agreement or standardization.” The word in the Fre ...
The Sky This Month Mar Apr 2015
The Sky This Month Mar Apr 2015

September Topic: Measurements/ Rocks and Minerals Grade: 8th
September Topic: Measurements/ Rocks and Minerals Grade: 8th

... moon, eclipses, and tides.  Gravity influences the motions of celestial objects. The force of gravity between two objects in the universe depends on their masses and the distance between them. Nine planets move around the Sun in nearly circular orbits.  The orbit of each planet is an ellipse with ...
Mar 2016 - Bays Mountain Park
Mar 2016 - Bays Mountain Park

NATS 1311 From the Cosmos to Earth
NATS 1311 From the Cosmos to Earth

... Density (gm/cm3) Avg. Distance from Sun (AU) Orbital Period (days) Sidereal Rotation Period (days) Inclination of axis to orbital plane ...
2009_Lecture15.v2
2009_Lecture15.v2

... occurred every few thousand years. Now they only occur over tens or hundreds of millions of years (so the lunar surface hasn’t changed too much). ...
Lecture 10. Roche Limit / Comets
Lecture 10. Roche Limit / Comets

Document
Document

... different from that of the four inner planets. In this chapter, we also discuss a set of moons of these giant planets, some of which range in diameter between ½ and ¼ the size of the Earth, as large as Mercury or Pluto. Close-up space observations have shown that these moons are themselves interesti ...
Teachers Edition Sample Chapter (1.2MB PDF)
Teachers Edition Sample Chapter (1.2MB PDF)

... In this part of the investigation, you will model the lunar cycle. Place a foam ball on a pencil or stick. This ball represents the Moon. Have another student hold a flashlight. The flashlight represents the Sun. Your head represents Earth. Hold the ball slightly above your head, at arm’s length fro ...
Jupiter`s ring
Jupiter`s ring

... formed together with Saturn because material would have been blown away by particle stream from hot Saturn at time of formation. ...
Jupiter: Cosmic Jekyll and Hyde - Mary Ann Liebert, Inc. publishers
Jupiter: Cosmic Jekyll and Hyde - Mary Ann Liebert, Inc. publishers

... objects already on Earth-crossing trajectories. The study by Wetherill (1994) contains only one reference that might be interpreted to mean that Jupiter has a role in shielding the inner Solar System in this manner. In regard to simulations where the jovian planets had acquired masses significantly ...
The Evening Sky Map
The Evening Sky Map

Year 7 Module 3 Practice Paper
Year 7 Module 3 Practice Paper

... what did Jupiter represent? ......................................................................... what did the moons represent? ................................................................... 1 mark Maximum 5 marks ...
Explosion of Sun - Scientific Research Publishing
Explosion of Sun - Scientific Research Publishing

... The Sun contains ~74% hydrogen by weight. The isotope hydrogen-1 (99.985% of hydrogen in nature) is a usable fuel for fusion thermonuclear reactions. This reaction runs slowly within the Sun because its temperature is low (relative to the needs of nuclear reactions). If we create higher temperature ...
The Sun is a Plasma Diffuser that Sorts Atoms by Mass*
The Sun is a Plasma Diffuser that Sorts Atoms by Mass*

... and isotopes in different SN layers mixed. Excess rand/or p-products [22] were found in the isotopes of Xe [6], Kr [29], and Te [8] in some meteorite minerals. The middle isotopes of Xe [30], Kr [30], and Te [8] were found to be enriched in other meteorite minerals from the s-process of nucleosynthes ...
SU3150-Astronomy - Michigan Technological University
SU3150-Astronomy - Michigan Technological University

... variations in earth rotation Above are accomplished through a combination of observations and computations Most computations involve the use of spherical coordinates to define the positions of celestial object and solution of spherical triangles Celestial objects in the universe include stars, sun, ...
Wednesday, Oct. 8
Wednesday, Oct. 8

... – Venus rotates backwards & Uranus rolls – inner planets are small & rocky – outer planets are large & gaseous – asteroids are old – Why Kuiper Belt Objects (KBO) and Oort cloud comets are icy ...
No Slide Title
No Slide Title

10. Atmospheres of Planets and of Exoplanets - ETH E
10. Atmospheres of Planets and of Exoplanets - ETH E

... Chapter 2). Our Atmosphere is able to bear heavy elements as Argon (Ar); light elements such as hydrogen (H2) and Helium (He) have been lost during its development. • As Venus, the Planet Mars has a CO2- Atmosphere. The largest part of its Atmosphere has probably been strippt off by the solar wind a ...
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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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