20 terms

Unit 1 -Checkpoint 1

STUDY
PLAY
RED SHIFT
Shift toward longer wavelengths of spectral lines emitted by a celestial object caused by object moving away from earth, important piece of evidence for Big Bang Theory
BLUE SHIFT
Shift toward shorter wavelengths of spectral lines emmited by a celestial object that is caused by object moving toward earth
SPECTRA
Lines of light that can tell you the composition of a star or galaxy
BIG BANG THEORY
Theory the universe began as a small point that expanded rapidly about 13.82 billion years ago
COSMIC BACKGROUND RADIATION
Weak radiation that is left over from early, hot stages of expansion of universe
STAR
Celestial body of hot plasma that radiates energy derived from thermonuclear reactions in the interior
SOLAR SYSTEM
Collection of planets and their moons in orbit around a sun, together with smaller bodies such as asteroids, meteoroids and comets
GALAXY
Huge group of single stars, star systems, star clusters, dust and gas bound together by gravity
UNIVERSE
All observable items, including galaxy clusters, galaxies, stars and planets
NEBULA
Large cloud of dust and gas in space
Doppler effect
An observed change in the frequency of a wave when the source or observer is moving
Mercury
Closest planet to the sun
Venus
Hottest planet in the solar system
Mars
The red planet
Jupiter
largest planet
Saturn
The sixth planet from the sun
Uranus
7th planet from the sun
Neptune
8th planet from the sun
Jovian Planets
Jupiter, Saturn, Uranus, Neptune
terrestrial planets
Mercury, Venus, Earth, Mars
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