Today (Saturday, May 14) is Spring Astronomy Day. I almost missed it. There's also a Fall Astronomy Day--this year it's Saturday, October 8--which makes sense because we see different nighttime skyscapes in spring and fall. I'm celebrating it by posting a photo of one of my favorite astronomical objects, the Ring Nebula, found in the constellation Lyra, which constellation can be seen in the night sky from here in spring.
The photo is by The Hubble Heritage Team (AURA/STScI/NASA),
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