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Prinn, R.G., "Origin and Evolution of Planetary Atmospheres: An
Prinn, R.G., "Origin and Evolution of Planetary Atmospheres: An

... third category are perhaps the least surprising. However, the precise manner in which such massive planets as Jupiter and Saturn formed within the low-pressure primitive solar nebula, and the nature of their deep interiors are far from understood. There are also questions concerning the observed pre ...
Origin of the orbital architecture of the giant planets of the Solar
Origin of the orbital architecture of the giant planets of the Solar

... the planets’ orbital periods also change. If initially the planets’ orbits were sufficiently close to each other, it is likely that they had to pass through low-order mean motion resonances (MMRs), which occur when the ratio between two orbital periods is equal to a ratio of small integers. These re ...
proposed path of the missing planet
proposed path of the missing planet

... Galactic and Earth ecliptic planes within the celestial sphere While there is “proper motion” (change in position of the stars relative to each other as seen on the celestial surroundings from Earth), the star field as a whole is far more relatively stable than the ever changing Earth projected grid ...
Questions 1-9
Questions 1-9

... Hemisphere. Scientists speculate it might be a gigantic hurricane, which because of its large size (the Earth could easily fit inside it), lasts for hundreds of years. Jupiter gives off twice as much heat as it receives from the Sun. Perhaps this is primeval 20) heat or beat generated by the continu ...
Uranus - Our Lady of Consolation National School
Uranus - Our Lady of Consolation National School

... The giant planets are sometimes also referred to as gas giants. Uranus has been visited by only one spacecraft, Voyager 2 on Jan 24 1986. Uranus is a giant gas planet which is made up of mostly rock and various ices. Uranus spins differently from most planets. It seems to be tilted "sideways" instea ...
May - RASC Hamilton
May - RASC Hamilton

Latitudes and Longitudes
Latitudes and Longitudes

... the Earth’s orbit, the midday sun on the first day of summer south of the Tropic of Cancer will be in the north. But in the autumn, between the Equator and the Tropic of Cancer, the midday sun will be in the south. Eratosthenes was born 2274 years ago in the city of Cyrene in present day Libya. Whil ...
THE EARTH AND THE UNIVERSE
THE EARTH AND THE UNIVERSE

... From our point of view, the earth seems to be the immobile centre of the universe,  while the sun moves through different constellations in the sky, which are represented  by their symbol in this visual.  The speed control allows you to change the speed of the simulation to adapt it to your  reflex ...
Slide 1
Slide 1

... Mercury’s small orbit causes it always to appear close to the Sun. At best you can see Mercury just after sunset or just before sunrise toward the horizon through a lot of blurring atmosphere. Early astronomers thought Mercury would be in synchronous rotation like our Moon. ...
Astrophysical Conditions for Planetary Habitability - Max
Astrophysical Conditions for Planetary Habitability - Max

... all that restrictive. Oxygen is the third most abundant element in the universe, and so many, or most, rocky planets are probably endowed with appreciable amounts of water when they form (e.g., Raymond et al., 2007). In our own Solar System, Mercury and Venus lack liquid water, while Earth and Mars ...
File - Mr. Catt`s Class
File - Mr. Catt`s Class

... fields as a consequence of circulating electric charges, such as in an electric generator or in molten magnetic material within a planet’s core. ...
Volume XXVI - Royal Asiatic Society
Volume XXVI - Royal Asiatic Society

... mansions, known in China 4,500 years ago. It covers a quarter of the zodiac occupying approximately the position of the constellations, Virgo, Libra and Scorpio. The fifth of its seven asterisms is Sim 心 the heart of the dragon containing three stars : the central one is Tai Wha 太火 Big Fire, which m ...
Chapter 30 - TeacherWeb
Chapter 30 - TeacherWeb

... this calendar came out to be 11 minutes longer than the solar year. ...
Comets - Earth & Planetary Sciences
Comets - Earth & Planetary Sciences

Chapter 2 User`s Guide to the Sky: Patterns and Cycles
Chapter 2 User`s Guide to the Sky: Patterns and Cycles

... atmosphere with scattered light, and you can only see the brilliant blue sky. ...
Solar System Astronomy Notes
Solar System Astronomy Notes

... left no writings, so what we know of him and his teachings is based on the writings of others, some of whom lived well after Pythagoras had died. The Pythagoreans believed (among other things), that: • Mathematics is divine. • The perfect mathematical shapes were circles and spheres. These beliefs l ...
here in Powerpoint format
here in Powerpoint format

The Earth in the Solar System
The Earth in the Solar System

... in cosmic dust. These imply that the solar system environs achieved high pressures due to passage of severe shock waves that would accompany only an event of this intensity. The problem with the supernova hypothesis is that it would imply that solar system formation is not a common phenomenon, which ...
A sound nebula: the origin of the Solar System in the field of a
A sound nebula: the origin of the Solar System in the field of a

... processes is beyond the scope of this article; we note here only that the power of the explosion would have been large enough for the shock wave to spread all over the pre-solar nebula2 . A long time observed active processes, such as jets and outflows associated with star formation, e.g. [10]-[18], ...
AN APPROACH TO THE LEMNISCATEPATH OF
AN APPROACH TO THE LEMNISCATEPATH OF

... harmonically   are   said   to   be   orthogonal.     Then   all   ellipses   containing   I   and   J   are   called   circles.     The  lemniscate of Bernoulli contains both those points as imaginary crossing points. We may replace the intuitive elements called "lines" by circles through a fixed p ...
Mystery Detectives
Mystery Detectives

... must breathe from air tanks because *F. there is too much oxygen on the surface of the moon.* *G. the moon has little or no atmosphere.* *H. the moon’s atmosphere is thicker than that on the Earth.* *J. the moon’s atmosphere has more carbon dioxide than the Earth’s.* ...
Analytical mechanics calculations for finding reasons of retrograde
Analytical mechanics calculations for finding reasons of retrograde

... bright bountiful and our earth attractive neighbor ,Venus. Venus opposite rotation is remained mystery for duration of its discovering time till now ,and it has been refereed to some hypothetic events such as external object impact with planet which supposed it changed its rotational direction ,or t ...
Chaos in the Solar System
Chaos in the Solar System

... showing that a region of relatively strong instability extend over these two resonances. This result was questioned by Sussman and Wisdom (1992) which did not recover such a large variation for the secular frequencies, but reached only 2(s4 − s3 ) − 3(g4 − g3 ) = 0 instead of (??). Recently, in our ...
Solar System - Manhasset Schools
Solar System - Manhasset Schools

... Pluto is in a region called the Kuiper (KY-per) Belt. Thousands of small, icy objects like Pluto are in the Kuiper Belt. ...
File - Flipped Out Science with Mrs. Thomas!
File - Flipped Out Science with Mrs. Thomas!

... expected to model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the sun causing changes in seasons. ...
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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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