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14 Cards in this Set

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