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- SUPERNOVA
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- When a sufficiently large star, at least 8 times more massive than the Sun, has burned up its fusion energy fuels and is
- in the final stages of life, it loses its inner balance and explodes. To an outside observer, the star will suddenly appear to
- powerfully brighten, then to fade out slowly. The explosion is called a supernova.
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- Without past supernova explosions, Earth and its natural life would not exist. In our Galaxy, an estimated two or three
- supernovas occur each century.
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- This Hubble Space Telescope picture shows three rings of glowing gas encircling the site of supernova 1987A, a star
- which exploded in February 1987. The supernova is 169,000 light years away, and lies in our neighbouring galaxy
- called the Large Magellanic Cloud.
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