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20 Cards in this Set

  • Front
  • Back
Orbit
the path a planet travels around the sun.
electromagnetic spectrum
the range of wavelengths or frequencies
solar system
the collection of nine planets and their moons in orbit around the sun
observatory
A building, place, or institution designed and equipped for making observations of astronomical, meteorological, or other natural phenomena
full moon
The moon when it is visible as a fully illuminated disk.
space probe
A spacecraft carrying instruments intended for use in exploration of the physical properties of outer space or celestial bodies other than Earth.
Mercury
is the closest planet to the sun. it atmosphere is made up of helium and hydrogen. Mercury is very hot it can be around 465˚C
radio telescope
A device used in radio astronomy for detecting and recording radio waves coming from stars and other celestial objects
meteor
A bright trail or streak that appears in the sky when a meteoroid is heated to incandescence by friction with the earth's atmosphere.
meteorite
A stony or metallic mass of matter that has fallen to the earth's surface from outer space.
comet
A celestial body, observed only in that part of its orbit that is relatively close to the sun
asteroid
Any of numerous small celestial bodies that revolve around the sun
new moon
The phase of the moon occurring when it passes between the earth and the sun and is invisible or visible only as a narrow crescent at sunset.
solar eclipse
an eclipse in which the sun is obscured by the moon.
lunar eclipse
an eclipse in which the moon appears darkened as it passes into the earth's shadow.
eclipse
an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination
sphere
A three-dimensional surface, all points of which are equidistant from a fixed point
axis
A straight line about which a body or geometric object rotates or may be conceived to rotate
rotation
The act or process of turning around a center or an axis:the axial rotation of the earth
revolution
Orbital motion about a point, especially as distinguished from axial rotation