description Little Gem Nebula Overview
The Little Gem Nebula is NGC 6818, a compact planetary nebula in the constellation Sagittarius. William Herschel discovered it in 1787, and its small, bright disk can be observed with modest amateur telescopes under suitable conditions. Despite the name, a planetary nebula is not related to planet formation: it consists of gas expelled by a dying star, illuminated and ionized by the hot stellar remnant at its center.
help Little Gem Nebula FAQ
What is the Little Gem Nebula's astronomical catalog number?
The Little Gem Nebula is NGC 6818. It is a compact planetary nebula in the constellation Sagittarius.
Who discovered the Little Gem Nebula?
William Herschel discovered the nebula in 1787. Herschel made many important discoveries while surveying the night sky with large telescopes.
Can amateur astronomers see the Little Gem Nebula?
Yes. Its small, bright disk can be observed with a modest amateur telescope under suitable conditions. Its compact appearance is why it earned the nickname Little Gem.
Is the Little Gem Nebula a planet?
No. A planetary nebula is a cloud of gas expelled by a dying star, not a planet. The name is a historical classification term that predates modern knowledge of stellar evolution.
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