Planetary nebulae are short-lived “leftovers” of sun-like stars. Most of these “star ghosts” only last--at most--about 25,000 years. Usually, their clouds of debris disperse so broadly that they fade out fairly quickly. However, there’s one that has lasted at least 70,000 years. That makes it a “grande dame” of planetary nebulae. A team of astronomers …
Planetary nebulae are short-lived “leftovers” of sun-like stars. Most of these “star ghosts” only last--at most--about 25,000 years. Usually, their clouds of debris disperse so broadly that they fade out fairly quickly. However, there’s one that has lasted at least 70,000 years. That makes it a “grande dame” of planetary nebulae. A team of astronomers …
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