NGC 300 in H-alpha, taken over two nights of the new moon.
A slightly reduced (70% full pixel size) original version here.
Remember reading a wise guru explaining patiently how those using narrowband filters on a galaxy should be sent to re-education camp?
13 off 1hr subs, 2x2 binned. (Unbinned, you don't see so much).
The sheer giga-tonnage of star-forming activity shows up the spiral arms quite spectacularly. Lots of little Tarantula's and Eta Carinae nebs and M42's, all wanting to scuttle off the page.
It is 6 million light years away. Even after 13 hours, the image is still appallingly gritty, but more hours will have to await next new moon, or next year, so we thought we'd show what we have.
Here we've
dropped the H-alpha in as red the top of the LRGB version.
Best,
Mike and Trish