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The Bengaluru-based Indian Institute of Astrophysics (IIA) has filmed the passing of the moon in front of Antares, a bright red star.

  • Antares, also known as Alpha Scorpii, is the alpha, or brightest, star in the constellation Scorpius, and the 15th-brightest star in the whole night sky.
  • It is a massive red supergiant star. It is 10,000 times brighter than our sun.
  • It is one of the largest known stars, 700 times the sun’s diameter, large enough to engulf the orbit of Mars if the solar system were centered on it.
  • Despite its size, the overall density of Antares is less than one-millionth that of the sun.
  • Antares is also relatively cool as stars go. Its surface temperature is about 6,100 degrees F (3,400 degrees C).
  • That’s in contrast to our sun’s surface temperature of about 10,000 degrees F (5,500 degrees C).
  • The star’s low temperature accounts for its ruddy color.