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Hubble views the Little Gem Nebula

8 August 2015 Astronomy Now

This colourful bubble is a planetary nebula called NGC 6818, also known as the Little Gem Nebula, discovered by William Herschel in 1787. It is located in the constellation of Sagittarius, roughly 6,000 light-years away from us. The rich glow of the cloud is just over half a light-year across.