The Dark Tower of Scorpius (Sept. 2018)

 

This is the Dark Tower, a cloud of gas and dust from which stars are forming.  Its glow is produced in reaction to ultraviolet radiation from NGC 6231, a cluster of young, bright stars off the screen to the left.  The Dark Tower doesn't really have a catalog designation or number, and it actually stretches a bit further to the left off this image. It's just an unnamed but interesting area of the sky.  The whole complex is perhaps 5,000 light years away.  NGC 6231 and the nebula can be seen (if you can see them) near the first (not the last) sharp curve of the scorpion's tale.

Grus Triplet (Summer 2018)

I've been saving this data till I could look at it again with a better eye.  This data comes from an observatory in Australia.

These three galaxies appear in the constellation Grus (the crane).   They are, from upper left to lower right, NGC 7582, 7590, and 7599.  The trio and one other companion, NGC 7552 (off the top of this frame), lie about 60 million light years distant.  The quartet is gravitationally interactive, and these three show tidal effects from each other's pull.  https://www.aanda.org/articles/aa/pdf/2005/01/aagi011.pdf.  One tidal tail stretches almost all the way from NGC 7582 to NGC 7590, but the tail is too dim and the wrong part of the spectrum to appear in this image.