"Comet" Mercury
Taken by Steven Bellavia on May 14, 2021 @
Southold, NY USA
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Details:
A 24 million km long plume of gas is ejected from Mercury's thin atmosphere due to the sun, very much like a comet.
This is only visible using a narrowband filter that captures the bright yellow sodium light at 589nm.
Photographer's website:
https://www.astrobin.com/orej1j/
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