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Stargazing: Red Hot Might Be Cool

From National Geographic: Some stars have always stood out from the rest. Their brightness is a factor of how much energy they put out, which is called their luminosity, and also how far away from Earth they are. Stars in the heavens may also appear to be different colors because their temperatures are not all the same.

Stargazing from Hawaii

On top of a dormant volcano, the Keck Observatory in Hawaii looks down on the clouds. In the middle of the Pacific Ocean, Hawai’i Island is surrounded by thousands of miles of thermally stable seas. The 13,796-foot Mauna Kea summit has no nearby mountain ranges to roil the upper atmosphere. Few city lights pollute Hawaiian