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Phases of the Moon - Cold Lake Middle School
Phases of the Moon - Cold Lake Middle School

... is tilted on its axis, different constellations are visible during different times of year and from different parts of the earth. - Constellations which are visible year-round from the Northern Hemisphere are called circumpolar constellations because they appear to circle the North Pole throughout t ...
Solar SyStem - Lorenz Educational Press
Solar SyStem - Lorenz Educational Press

... The Sun is a star made up of hot gases that explode with energy similar to that of a continuously exploding nuclear bomb. It is the center of our Solar System. It provides us with heat and light. The Sun has been spinning on its axis and exploding for about 5 billion years. The Sun is an average-siz ...
Chapter 1: Solar System
Chapter 1: Solar System

... Is a doughnut-shaped region that extends from beyond Neptune's orbit to about 100 times Earth's distance from the sun. ...
Kepler`s Law - New Mexico Tech
Kepler`s Law - New Mexico Tech

... of great gas and dust clouds within a galaxy, usually nebulas. By gaining enough mass and gravity, the star begins to emit radiation and ultimately create enough heat within the core to cause nuclear fusion. Finally when the star gets hot enough, the true hydrogen fusion within the star begins, givi ...
Solar System from Web
Solar System from Web

... of great gas and dust clouds within a galaxy, usually nebulas. By gaining enough mass and gravity, the star begins to emit radiation and ultimately create enough heat within the core to cause nuclear fusion. Finally when the star gets hot enough, the true hydrogen fusion within the star begins, givi ...
ppt - Earth and Space Sciences at the University of Washington
ppt - Earth and Space Sciences at the University of Washington

... Oort cloud - extends out 50,000 AU (1000 x Pluto’s orbit) (nearly a light year, 25% of distance to nearest star) Voyager 1: 125AU, edge of heliosphere, 17km/s, 36 years, = 17 light-hours from Earth ...
Two Dissipating Exoplanet Atmospheres Taken from: Hubble
Two Dissipating Exoplanet Atmospheres Taken from: Hubble

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ASTRonomy 103 - Solar Physics and Space Weather
ASTRonomy 103 - Solar Physics and Space Weather

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Chapter 12
Chapter 12

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Ancient Astronomy
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1Barycenter Our solar system consists of the Sun and the
1Barycenter Our solar system consists of the Sun and the

... Moon is said to orbit or revolve around the Earth. The Earth doesn’t stays in position as the Moon circles it. Just like the planets orbiting the Sun, moons orbiting planets also comprise a system with a center of mass. For the EarthMoon system, the barycenter is located 1,710 km below the surface o ...
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... Even today, some textbooks describe the Solar System as a quiet, highly ordered structure. The Sun is in the center and planets revolve around it on neat elliptical orbits that are assumed to be the same since the time of creation of the Solar System. The space in between (the interplanetary space) ...
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... 3. Students know that our solar system consists of one star, eight planets and numerous other smaller objects. (10 mins) The view zooms into our solar system, showing the eight planets, the Sun and the asteroid belt in between the terrestrial planets and the gas giants. Students consider what the Ea ...
The Solar System and our Universe
The Solar System and our Universe

... • The Universe is the whole of space & includes billons of groups of stars – Galaxies. • Galaxies – each with billion of stars, many with a solar system. • Our galaxy is called Milky Way. • In a stars lifetime, it changes size & colour as different reactions take place in its core. • Some stars exp ...
The Solar System Interplanetary Matter and the Birth of the Planets
The Solar System Interplanetary Matter and the Birth of the Planets

... the collision. But we know now that collision (or near collisions) between two stars are very, very rare. Considering that collision are rare, the proposed idea of the collision may explain a unique event on how our planetary system formed but not how other planetary systems formed. During the rest ...
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Sept2 - University of Arizona
Sept2 - University of Arizona

... by the Congregation of the Index "until corrected." It stayed on this list of prohibited books and teachings until 1822. Martin Luther (1483-1546): [Copernicus] “is a fool who wishes to reverse the entire scheme of astronomy; but sacred scripture tells us that Joshua commanded the Earth to stand sti ...
Planetary Orbit Simulator – Student Guide
Planetary Orbit Simulator – Student Guide

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The Laws of Planetary Motion
The Laws of Planetary Motion

... the gravitational field but never reaching the Earth, which is curving away at the same rate that the projectile falls. That is, the cannon ball would have been put into orbit around the Earth. Newton concluded that the orbit of the Moon was of exactly the same nature ...
THE SOLAR SYSTEM UNITS OF MEASURMENT IN ASTRONOMY
THE SOLAR SYSTEM UNITS OF MEASURMENT IN ASTRONOMY

... = 150,000,000 km = AVERAGE DISTANCE FROM EARTH TO THE SUN LIGHT YEAR = 5.9 X 1012 MILES = 9.5 X 1012 km = THE DISTANCE LIGHT TRAVELS IN ONE YEAR Speed of light = 186,000 mi/sec = 3 x 108 meters/sec ...
P101.EXAM1.931.v2 - KFUPM Faculty List
P101.EXAM1.931.v2 - KFUPM Faculty List

... 19) Astronomers have found planets around a star called Upsilon Andromedae, which is at a distance of 44 light years from our solar system. Assume a spacecraft that can travel with a speed of 5  104 km/hr (a typical speed of a present day spacecraft), how long would it take to reach that new planet ...
Searching For Planets Beyond Our Solar System - Cosmos
Searching For Planets Beyond Our Solar System - Cosmos

... origin of our own Solar System. Numerous questions related to this problem remain unanswered: how was our Solar System formed? is planet formation a common or rare phenomenon? is our Sun's single status (many, if not most stars are found in binary systems) related to the fact that it has a planetary ...
origins of the Universe
origins of the Universe

... in the early 1900’s astronomers started to find evidence that pointed to a Big Bang. • In 1922, astronomer Edwin Hubble observed that the universe was expanding. The most distant galaxies he could see through his telescope were moving away at about 40 000 km per second. • This observation led to wha ...
Week 9
Week 9

... l 91.2 nm è nlo nhi ø ...
life
life

... even if they do exist, United Federation of Planets probably precluded by large distances (at least on basis of current physics) ...
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IAU definition of planet



The definition of planet set in Prague in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which: is in orbit around the Sun, has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and has ""cleared the neighborhood"" around its orbit.A non-satellite body fulfilling only the first two of these criteria is classified as a ""dwarf planet"". According to the IAU, ""planets and dwarf planets are two distinct classes of objects"". A non-satellite body fulfilling only the first criterion is termed a ""small Solar System body"" (SSSB). Initial drafts planned to include dwarf planets as a subcategory of planets, but because this could potentially have led to the addition of several dozens of planets into the Solar System, this draft was eventually dropped. The definition was a controversial one and has drawn both support and criticism from different astronomers, but has remained in use.According to this definition, there are eight planets in the Solar System. The definition distinguishes planets from smaller bodies and is not useful outside the Solar System, where smaller bodies cannot be found yet. Extrasolar planets, or exoplanets, are covered separately under a complementary 2003 draft guideline for the definition of planets, which distinguishes them from dwarf stars, which are larger.
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