Star Color and Energy
A star’s color provides a direct measurement of its surface temperature; the hottest stars shine blue-white, while the coolest are […]
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Cosmic Beacons
One of the great mysteries of the ancient world was the nature of the stars. As people watched these twinkling
Our Star, the Sun
The Sun was born about 4.6 billion years ago from the gravitational collapse of a vast cloud of gas and
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