cloud of gas near the planetary nebula NGC 3242. determination method: SHA-1 described at URL: https://noirlab.edu/public/images/noao-ngc3242 URL: https://noirlab...
cloud of gas near the planetary nebula NGC 3242. determination method: SHA-1 described at URL: https://noirlab.edu/public/images/noao-ngc3242 URL: https://noirlab...