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A Brief History of the Solar System
A Brief History of the Solar System

... first generation stars, the protostellar disk may survive even after the star is born. The disk is then called a proto-planetary disk because all the planets, planetesimals, comets, asteroids, etc. are formed out of the material within this disk. However, if the mass of the newly born star is a few ...
Untitled
Untitled

... largest optical telescopes on Earth. But it could not detect a planet orbiting another star. In visible light, stars are much brighter than any companion planet. To see planets, we must look in other wavelengths of the spectrum. The Spitzer Space Telescope is an infrared observatory, orbiting the su ...
Ellipses, Parallax, and Retrograde Motion
Ellipses, Parallax, and Retrograde Motion

GEOCENTRIC AND HELIOCENTRIC MODELS
GEOCENTRIC AND HELIOCENTRIC MODELS

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Chapter 8
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... discovered more than 200 similar objects orbiting the Sun at the same distance as Pluto • In 2006, a new family was introduced – the dwarf planets – Massive enough to pull themselves spherical – Orbits have not been swept clear of debris ...
The Solar System - Solon City Schools
The Solar System - Solon City Schools

... planets. Aristotle stated that the earth was in the center of the solar system. Ptolemy stated that the earth was in the center of the universe. He thought that the planets moved in small circles as they moved around the sun. ...
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award

... award: ...
Grade 8 Science Astronomy Benchmark DO NOT WRITE ON THIS
Grade 8 Science Astronomy Benchmark DO NOT WRITE ON THIS

... 25. The Moon’s gravitational force has a greater effect on the ocean tides of Earth than the Sun’s gravitational force. What is the reason for this? 1. The Moon has a greater mass than the Sun. 2. The Moon is closer to Earth than the Sun. 3. The Moon’s mass is less than the Sun. 4. The Moon is a sol ...
Benchmark One Study Guide: Science Benchmark Wed
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Powerpoint 2003
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EXOPLANETS The search for planets beyond our solar system
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The Galilean Moons of Jupiter
The Galilean Moons of Jupiter

... Largest is bigger than Maryland - emits more energy than all Earth volcanoes combined! Most geologically active object in the solar system. Causes a thin atmosphere and smooth surface. Io is about the size of our moon. Why is it's volcanic activity surprising? ...
The Jovian Planets
The Jovian Planets

... Discovered by Clyde Tombaugh in 1930, working at Lowell Observatory in Flagstaff, AZ Compared (by eye!) an enormous amount of pairs of photographic images, looking for faint objects whose positions slowly changed… ...
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... Comets are small, fragile, irregularly shaped bodies composed of a mixture of non-volatile grains and frozen gases. They are thought to come from places in the Solar system called the Kuiper belt, and the Oort Cloud. The Kuiper Belt is a disk-shaped region past the orbit of Neptune extending roughly ...
The First Thousand Exoplanets
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... smallest exoplanets yet detected orbiting a red dwarf very similar to Barnard’s Star. In 1988, Bruce Campbell and his collaborators published radial velocity evidence of a planetary companion to Gamma Cephei, though they used cautious language in their paper (Campbell et al. 1988). The interpretatio ...
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Study Guide 24-4 – Other Objects in the Solar System

... area between the orbits of Mars and Jupiter. This is known as the Asteroid Belt →  Why are they located there? Jupiter’s gravity might have kept a planet from forming in the area where the asteroid belt is located. The Near Earth Asteroid The data showed that Eros has Rendezvous (Near) occurred in ...
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... —The inner planets are all small and rocky which is why they are called the “Rocky Midgets.” —The inner planets are all solid. —The inner planets are all warmer because they are closer to the sun. ...
Science In The Renaissance!
Science In The Renaissance!

... He defined the laws of motion and universal gravitation which he used to predict precisely the motions of stars, and the planets around the sun. • Invented integral calculus, and jointly with Leibnitz, ...
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FREE Sample Here

... any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part ...
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... A. East to west motion of the Sun over many successive nights. B. East to west motion of the Moon relative to the stars over many successive nights. C. Occasional east to west motion of the planets relative to the stars over many successive ...
Wednesday, October 24, 2007
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... the constellation Perseus, approaching Sun and Earth Normally very faint, difficult to see, but last weekend it brightened several hundred thousand times, is now naked eye visible in good sky conditions. The eruption is probably a sudden release of a lot of ice. It should be a good sight—yellow fuzz b ...
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... just how big does a planet need to be to become a full-fledged planet instead of a dwarf? You might think the minimum size requirement is arbitrary, but the size cutoff is actually based on other properties of the object and its history in the Solar System. Both planets and dwarf planets orbit the S ...
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Planets - learnfactsquick.com
Planets - learnfactsquick.com

... of the Greek god Hermes, the messenger of the Gods. The planet probably received this name because it moves so quickly across the sky. Mercury has been known since at least the time of the Sumerians (3rd millennium BC). It was sometimes given separate names for its apparitions as a morning star and ...
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Definition of planet



The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.
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