مصطلحات elain.pell

barred-spiral galaxy

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A form of disc galaxy in which the spiral arms are attached to the galactic nucleus by a straight bar of stars. They are part of the Hubble classification of galaxies.

blackbody temperature

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The temperature of an object if it is re-radiating all the thermal energy that has been added to it. If an object is not a blackbody radiator, it will not re-radiate all the ...

coronal mass ejection (CME)

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An observed change in the Sun’s coronal structure that occurs on a time scale between a few minutes to several hours, and involves the appearance of a new discrete, bright, white ...

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