AUTHOR=Kuhn Jeff R. TITLE=Grand Challenges in Astronomical Instrumentation JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=7 YEAR=2020 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2020.00048 DOI=10.3389/fspas.2020.00048 ISSN=2296-987X