Astrophysics

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6 Terms

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Luminosity

The amount of energy emitted by a star per second.

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Apparent Magnitude

A measure of how bright a star appears from Earth.

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Absolute Magnitude

Measure of the intrinsic brightness of a star from 10 parsecs from Earth.

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Hertzsprung-Russell Diagram

A graph plotting stars' temperature against their absolute magnitude.

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Red Shift

The phenomenon where light from distant galaxies shifts to longer wavelengths.

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Cosmic Microwave Background Radiation (CMBR)

Electromagnetic radiation observed in all directions in space.