This 2014 video is called Betelgeuse: The Clock Is Ticking, Great Supernova Explosion Is Soon.
From the Daily Galaxy blog:
June 24, 2011
The small red circle in the middle is Betelgeuse, a red supergiant in the constellation of Orion, one of the brightest stars in the night sky. with a diameter about four and half times that of the Earth’s orbit. The black disc corresponds to a very bright part of the image that was masked to allow the fainter nebula to be seen.
Betelgeuse is also one of the biggest known stars, almost the size of the orbit of Jupiter. The VLT image shows the surrounding nebula, which is much bigger than the supergiant itself, stretching 60 billion kilometres away from the star’s surface — about 400 times the distance of the Earth from the Sun.
Red supergiants like Betelgeuse represent one of the last stages in the life of a massive star in which the star increases in size, and expels material into space at a tremendous rate — it sheds immense quantities of material equal to the mass of the Sun in just 10 000 years. …
The nebula cannot be seen in visible light, as the very bright Betelgeuse completely outshines it. The irregular, asymmetric shape of the material indicates that the star did not eject its material in a symmetric way. The bubbles of stellar material and the giant plumes they originate may be responsible for the clumpy look of the nebula.
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