1993, in the meaning defined above
astroimag(ing) "making of images of astronomical objects" (from astro- + imaging entry 2) + -er entry 2
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“Astroimager.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astroimager. Accessed 30 Sep. 2022.
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