EarthSky Community Photos

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Steven Bellavia
Southold, NY
09:00 pm

Equipment Details:

Borg 90FL f/4 astrograph, ZWO ASI 183MM Pro camera, Edmund Optics 589nm , 10nm bandpass filter

Post-processing Details:

20 x 60 - second photos calibrated with dark, flat and dark-flat frames

Image 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.