https://wiyn.org/
WIYN 3.5m Observatory
observatory
https://www.nist.gov/measuring-cosmos/north-america/wiyn-telescope
WIYN Telescope | NIST
telescopenist
https://science.nasa.gov/asset/hubble/wiyn-emission-line-image-of-dumbbell-nebula/
WIYN Emission Line Image of Dumbbell Nebula - NASA Science
Aug 17, 2025 - Ground-based image of Dumbbell taken with KPNO WIYN 3.5m telescope in H-alpha, [O III], and [O I] filters. WIYN Dumbbell Nebula Photo Page
dumbbell nebulaemissionlineimagenasa