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