Youngest planetary nebula

According to Official Guinness Records,

The Stingray Nebula, 18,000 light years away in the southern constellation of Ara, was observed as a star in the 1970s. In 1996 the Hubble Space Telescope imaged it and found that, in the intervening 20 years its central star had heated up enough to make its surrounding ejected gas shells glow as a planetary nebula.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in United Kingdom.

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