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14 Cards in this Set
- Front
- Back
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absorption line
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Dark line in a bright spectrum, where light within one narrow frequency range has been removed
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accretion
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gradual growth of bodies, such as stars or planets, by the accumulation of gas or other smaller bodies
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angular resolution
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the ability of a telescope to distinguish between adjacent objects in the sky
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aphelion
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The point on a planet's elliptical path that is most distant from the Sun
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asteroid belt
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Region of the Solar System, between the orbits of Mars and Jupiters in which most asteroids are found
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atmosphere
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Layer of gas that is close to a planet's surface by the force of gravity
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Big Bang
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Event that cosmologists consider the beginning of the universe
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Black hole
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a region of space where the pull of gravity is so great that nothing, not even light, can escape
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celestial equator
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the projection of the Earth's equator onto the celestial sphere
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chromatic aberration
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the tendancy for a lens to focus red and blue light differently, causing images to become blurred
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constellation
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a human grouping of stars in the night sky into a recognizable pattern
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cosmology
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the study of the stucture and evolution of the entire universe
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crater
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bowl-shaped depression on the surface of a planet or moon, resulting from a collision with interplanetary debris
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eclipse
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Event during which one body passes in front of another, so that the light from the other body is blocked
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