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Science Vocabulary99

Science Vocabulary 5-21-12

Geocentric (theory) The discredited theory of the arrangement of the solar system that places the earth at the center with the sun and the planets orbiting earth.
Heliocentric (theory) any theory of the arrangement of the solar system that places the sun at the center with the earth and the other planets in orbit around it.
Who is Kepler A German Mathematician who first proposed the three laws of celestial Motion.
inertia The tendency of all objects in the universe to remain at rest if initially at rest.
Ecliptical The apparent path of the sun among the stars.
Equinox either of two days during a year when the sun's noon position is directly above the equator.
Milky Way The galaxy that contains our solar system
wavelength The horizontal distance from one wave crest to the next
Galileo 1564–1642, Italian physicist and astronomer.
Copernicus 1473–1543, Polish astronomer who promulgated the now accepted theory that the earth and the other planets move around the sun
Foucault 1819–68, French physicist.
Wave-lengths the distance, measured in the direction of propagation of a wave
magnitude greatness of size or amount.
radio (telescope) a radio receiver with a large, dish-shaped antenna system.
Refractor (Telescope) A telescope that uses only lenses to concentrate the light from an object and focus it into an image.
Hubble Space Telescope An astronomical reflecting telescope placed in Earth orbit by the space shuttle in 1900.
composite (telescope) a telescope that uses both a primary mirror and a large objective corrective lens as the main light-gathering elements of the telescope
galaxy (resolution) a collection of millions of stars that are arranged in a variety of patterns around a gravitational center.
resolution (optical) The ability of a lens or mirror to visually separate two objects that are separated by a small angle.
Constellation In ancient times, a named pattern of stars that represented famous characters, animals, or familiar objects.
supernova A star that suddenly increases its apparent brightness by about twenty magnitudes
coordinates For astronomical body its, celestial coordinates DEC, given in degrees north or south of the celestial equator, and the RA, given in hours, minutes, and seconds east of the prime hour circle
Newtonian (reflector) A telescope in which light from an object is collected by a concave mirror mounted at the bottom of a rigid tube
distance the state or fact of being apart in space, as of one thing from another; remoteness.
heavens the abode of God, the angels, and the spirits of the righteous after death; the place or state of existence of the blessed after the mortal life.
gnomon an early astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon.
albedo The fraction or percentage of the light shining on a planet or other nonluminous celestial object that it reflects.
nova A star that explodes and increases in brightness up to ten magnitudes but is not destroyed in the process.
nebulae A cloud of gas and dust in outer space
RA Celestial longitude
Chromatic aberration the variation of either the focal length or the magnification of a lens system with different wavelengths of light, characterized by prismatic coloring at the edges of the optical image and color distortion within it.
Created by: hannahlgranger