Archive for August 25th, 2020

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Summer observing: planetary nebulae

August 25, 2020

Messier and Caldwell planetary nebulae, modified from the Caldwell object star chart produced by Jim Cornmell at https://commons.wikimedia.org/wiki/File:CaldwellStarChart.svg. Both the original file and this modified version are released under a Creative Commons Attribution Share-Alike license (CC BY-SA 3.0).

This all-sky chart shows the planetary nebulae from the Messier and Caldwell catalogs. Horizon lines are for southern California for the next couple of weeks. I put this together for a little observing feature I’m writing for Nightwatch, the monthly newsletter of the Pomona Valley Amateur Astronomers. I don’t know how well this map will reproduce, which is why I’m stashing a high-res copy here, so I can link to it in the newsletter feature. I will eventually post the observing feature here, too, probably sometime next week after the PVAA members have had a chance to see it in Nightwatch.

EDIT: I’m too lazy to reformat the observing feature for the blog, but I will link to it: here you go.