NGC 2359, “Thor’s Helmet”, is an unusual type of nebula that surrounds a Wolf-Rayet star.
Click on the image or link to see a larger version with more information.
This massive star will one day explode in a supernova!
This is almost 7 and a half hours of total exposure combining narrowband hydrogen-alpha data with normal RGB.
It’s getting to be the prime season for shooting NGC 2359 as it is now transiting at about 2:30 a.m., which gives you a couple of hours before transit to start shooting it, and a couple of hours after transit to continue shooting before the start of astronomical twilight.
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