AUTHOR=Howell Steve B. 

TITLE=The Grand Challenges of Exoplanets

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.2020.00010

DOI=10.3389/fspas.2020.00010

ISSN=2296-987X