Space Observations | Shifty light
Shifty light
Astronomers take observations gathered from telescopes and apply their knowledge of how light travels to theorize on the past, present, and future behavior of objects in space. The Doppler effectThe change in wavelength and frequency (number of vibrations per second) of either light or sound as the source is moving either towards or away from the observer. or Doppler shift is one way that astronomers make measurements on the light they observe. Astronomers use the Doppler effect to calculate the speed of an object and its movements.
Although they are not visible, light energy travels in wavesA motion in which energy and momentum are carried away from some source; a wave repeats itself in space and time with little or no change.. Water and sound energy also travel in waves. A wave is a vibrational...
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