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Sirius, our brightest star, is orbited by a white dwarf — a dead star's core. Where is the planetary nebula that would have formed when it shed its skin?

Sirius, our brightest star, is orbited by a white dwarf — a dead star's core. Where is the planetary nebula that would have formed when it shed its skin?

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The brightest star in Earth’s night sky, Sirius, is orbited by a white dwarf — a dead star’s core. This binary companion would have lost its planetary nebula nearly 100 million years ago, leaving nothing to see today.

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Sirius, our brightest star, is orbited by a white dwarf — a dead star's core. Where is the planetary nebula that would have formed when it shed its skin?

What do you think accounts for the very different planetary chemical and geological properties in the solar system as they all formed from the same solar nebula? - Quora