Earth Science - Chapter 16

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Parallax

Apparent change in the position of a distant object when seen from two different places

Concave mirror

Mirror that curves inward

Galaxy

Hugh collection of stars, gas, and dust that travels together through space

Convex lens

Lens that is thicker in the middle than it is at the edges

Astronomy

Study of stars, planets, an other objects in space

Solar system

Sun and all the bodies that orbit it

Reflecting telescope

Telescope that uses a concave mirror to collect light

Refracting telescope

Telescope that uses convex lenses to produce an enlarged image

Astronomical unit

Unit of measurement based on the Sun's distance from Earth and equal to about 150 million km.

Light year

Unit of measurement equal to about 10 trillion km


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