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Astronomy Vocab Games

Electromagnetic Spectruma way of organizing all types of light waves according to frequency
Galaxy Clustera system of galaxies containing from several to thousands of member galaxies
Doppler Effectdescribes how wavelength changes as the source moves toward or away from the observer
Sunan average sized star that is the source of all energy on our planet
Apparent Magnitudethe brightness of a star as viewed from Earth
Galaxya collection of stars, dust, and gasses held together by gravity
Milky Wayour galaxy
Nebulaa cloud of dust and gases in which stars form
Protostara developing star not yet hot enough to perform nuclear fusion
Main Sequencewhere stars spend 90% of their lives
Red Gianta large, cool, bright star that is found in the upper right corner of the HR diagram
Super Giantwhat very large stars become after they run out of hydrogen fuel
Supernovaan exploding star that increases in brightness several times
Black Holea massive star that has collapsed to such a small volume that its gravity prevents the escape of everything, including light
Neutron Stara star of extremely high density composed entirely of neutrons
Pulsara spinning neutron star
Big Bangtheory that explains the origin of the universe
Cosmic Background Radiationlow frequency EM radiation that is thought to be leftover from the Big Bang
Reflectinga telescopes that uses large mirrors to focus visible light into an image
Gamma Rayhighest frequency EM radiation; used in chemotherapy
X Rayinvisible EM radiation that is used in medical imaging
Visible Lightall the color of the rainbow - ROY G BIV!
Wavelengthdistance between two adjacent wave crests
Frequencythe number of wave crests that pass a certain point in a certain time
Periodthe time it takes for a wave to complete one wave cycle; the inverse of the frequency
Amplitudehow "big" a wave is; distance from midpoint to a wave crest or trough
Binary Starone of two stars revolving around a common center of mass because of their mutual gravitational attraction
Solar Flarea sudden and tremendous explosion in the solar atmosphere
Absorption Spectrumalso known as a dark-line spectrum; created when white light is passed through a cool gas
Emission Spectrumalso known as a bright-line spectrum; created by a hot glowing gas
Continuous Spectrumspectrum that shows all the colors of the rainbow; created when white light is passed through a prism
Hertzsprung-Russell Diagramdiagram that shows the relationship between stars' temperature and brightness
Microwavelow frequency, invisible EM radiation; used for communications and cooking
Infrared RadiationEM radiation just outside the visible range; heat energy
Corelayer of the sun in which nuclear fusion occurs
Radiation Zonelayer of the sun in which energy moves out from the core
Convection Zonelayer of the sun in which matter moves in density cycles
Photospherelayer of the sun that we can see; brightest layer
Chromospherelayer of the sun only visible during a solar eclipse; named for the red color that helium produces
Solar Prominencea concentration of gases above the solar surface that appears as a bright archlike structure
Coronathe weak outer layer of the solar atmosphere; only visible during a solar eclipse
Sunspota large dark spot on the sun; cool relative to the surrounding bright areas; caused by interference of convection cycles by sun's magnetic field
Granulationspeckled appearance of the sun's photosphere; caused by convection currents
Aurora Borealiscolored light show caused by charged particles in the solar wind interacting with atoms in the Earth's atmosphere
Solar Windstreams of charged particles ejected at high speeds from the solar corona
Solar Eclipseoccurs when the moon moves in a line directly between Earth and the sun, casting a shadow on the Earth

Union Mine Science Teacher
Union Mine High School

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