A spectrograph is an instrument that helps astronomers to determine surface temperatures, composition of stars and radio signals from space.
What is a spectrograph?
A spectrograph is a device that divides incoming light into wavelengths or frequencies and records the resulting spectrum in a multichannel detector such as a photographic plate.
What can spectrograph give information about?
It can give information on planets, comets, stars, interstellar gas, and galaxies' chemical composition, temperature, and velocity.
It can also determine surface temperatures and radio signals from space
To learn more about radio signals and spectrograph here,
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