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[DOC File]KEY TERMS
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The universe is defined as everything that physically exists throughout all of space and time. We know that this is very, very big. Current evidence states that the known universe is about 14 billion years old and about 93 billion light years in any direction.
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[DOC File]Lecture Notes: CH 22 History of Astronomy and the Moon
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This chapter opens with a short presentation of basic astronomy to place Earth in context with the rest of the Universe. Our solar system is a small part of a much larger aggregate of stars, planets, dust, and gases called a galaxy. Our galaxy, the Milky Way, contains the sun and the nine planets that orbit around it.
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Study Guide: Solar System
- a model of the universe in which earth is at the center of the revolving planets and stars. In geocentric system, the earth is at the center of the revolving planets and sun. ... Copernicuswas able to work out the arrangement of the known planets and how they move around the sun. Galileo’s Evidence .
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[DOCX File]Study Guide: Chapter 1 The Solar System
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The polestar, called Dhruvaloka, is the pivot of this universe, and all planets move around this polestar. All the stars are planets, as far as we can see, within this one universe. According to Western theory, all the stars are different suns, but according to Vedic information, there is only one sun within this universe.
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[DOCX File]Unit 2: ASTRONOMY
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He also tried to explain the nature and structure for the universe as a whole. He developed an early system of cosmology. In about 370 BC, Euxodus of Cnidus had developed a mechanical system to explain the motion s of the planets. Euduxos taught that the planets, sun, the moon, and the stars revolved around the earth.
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[DOCX File]Studying the Structure of the Universe
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This unit covers the origin of the universe, stars and galaxies, the solar system, and the Earth, Moon, and Sun as an interacting system. ... what layered the planets, and how they were separated into two distinct groups: Jovian and Terrestrial ... The Milky Way is known as a _____, with our solar system located in one of the outer arms ...
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[DOC File]The Big Bang – Lesson Plan (grades 4-6)
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If any one of these constants were varied by 1-2%, the Universe could never have developed the way it has. After the Big Bang, either all the hydrogen would have combined to form helium in the first million years, leaving no stars, only inert gas clouds. Or the Universe would have expanded too quickly for galaxies or stars and planets to aggregate.
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[DOC File]Introduction - Michigan Technological University
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("Earth-centered") view of the universe, believing that Earth was a sphere that stayed motionless at the center of the universe. Orbiting Earth were the seven wanderers (planetai. in Greek), which included the Moon, Sun, and the known planets—Mercury, Venus, Mars, Jupiter, and Saturn.
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Geocentric model - Wikipedia
The universe is organized into groups of millions or billions of stars called what? ... The attraction between 2 objects in known as _____. ... explained how the inertia of a planet and gravity of the sun work together to create the elliptical orbit path of the planets. The universe is organized into groups of millions or billions of stars ...
number of known planets

[DOC File]The Origins of Modern Astronomy
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Geocentric Model: Moon, Sun & known planets - Mercury, Venus, Mars etc. - orbit Earth. Heliocentric Model: Ptolemaic System -Accounted for movement of planets.
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Known planets in the universe