25.4 MB (656.4 KB compressed)
3720 x 2384 pixels
31.5 x 20.1 cm ⏐ 12.4 x 7.9 in (300dpi)
JOHN SANFORD / SCIENCE PHOTO LIBRARY JOHN SANFORD / SCIENCE PHOTO LIBRARY
Photograph of Betelegeuse, the second brightest star in the constellation of Orion & the 12th brightest star in the sky. Also known as Alpha Orionis, it is a red supergiant star (spectral type M21) 520 light years away. It is a semi- regular variable star with a period of about 5.8 years. 22 min exposure.
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