Measurement of Stars’ Luminosities

Measurement of Stars’ Luminosities

1098449_169590806559986_1100941767_nIn the 1910s, Danish astronomer Ejnar Hertzsprung and American Henry Norris Russell independently plotted the luminosities or intrinsic brightnesses of stars against their temperatures or colours. They found that most stars lie along a narrow strip that runs from hot and luminous to cool and dim – the so-called Main Sequence, where stars spend most of their lives fusing hydrogen into helium.

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