essential question how do astronomers use the electromagnetic spectrum to study the universe?
TRANSCRIPT
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Essential Question
How do astronomers use the electromagnetic spectrum to study the universe?
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Electromagnetic SpectrumThe range of radiant (light) energy
arranged in order of wavelength and frequency
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WavelengthThe distance between to crests
of a wave
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FrequencyA count of the number of crests that pass a
point in a given amount of timeHigh frequency = high energy
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Radio WavesTransmitted by a
radio stationAstronomers use
them to study what stars are made of, their structure and movement
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MicrowavesUsed to cook your foodUsed to learn about galaxiesUsed to learn about stars that are behind
clouds of dust
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Infrared WavesUsed by astronomers to
map dust between starsThere are 2 types:
○ 1 comes from the heat from the sun
○ 1 is used in any device that has a remote control
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Visible LightRainbows show
the different wavelengths of light
We are able to see colors of stars which gives us a clue about their temperature
Helps us understand the Red Shift and Blue Shift
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Ultraviolet RaysNewly formed stars
give off UV raysUsed to learn about
the structure and how galaxies change
Causes you to get sunburned
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X-Ray WaveBlack holes give off X-Ray wavesUsed in hospitals and doctors offices
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Gamma RaysGiven off from any explosion like a
supernova or a black holeAstronomers use them to gain knowledge
of how our universe began and how fast it is expanding
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Radio Waves: The Sun
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X-Ray: Andromeda Galaxy
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Infrared: Constellation Orion