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Diameter of the Milky Way
Diameter of the Milky Way

Astronomy Study Guide Review
Astronomy Study Guide Review

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Venus - Long Lawford Primary School

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THE MEDIEVAL ARISTOTELIAN WORLD VIEW Some

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... 2) How does speed affect it? C. What are two units of measure for long stellar distances? D Describe the apparent shift in position caused by motion of the observer (parallax). 1) What is the maximum distance using parallax and still maintain accuracy? 2) Describe the motion of the observer as their ...
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SNC 1PW - TeacherWeb

... 23. ___________ are huge clouds of dust and gases that are the birthplace of stars. 24. A _______________ is an enormous explosion at the end of a large star’s life. By this stage, the star has used up all of its fuel needed to continue nuclear fusion. 25. A __________ ________ is a small, very dens ...
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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 7011149597870700000♠149597870700 meters (about 150 million kilometers, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
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