The NASA/ESA Hubble Space Telescope managed to capture this stunning image of emission nebula NGC 2313. What sets this nebulae apart from others? Emission nebulae are bright and diffuse clouds of ionized gas that emit their own light. The bright star V565 that you see in the center showcases a silvery, fan-shaped veil of gas and dust, while the right half is obscured by a dense cloud of dust.
Nebulae with similar shapes were once known as “cometary nebulae” due to the fact that the star with an accompanying bright fan looked like a comet with a bright tail. Some of this language that astronomers use changes as they become better acquainted with the universe, which means astronomical history has a host of now-obsolete phrases to describe objects in the night sky, like “spiral nebulae” for spiral galaxies.
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