Richard Conn Henry (born 7 March 1940[1]) is an Academy Professor of Physics and Astronomy at Johns Hopkins University, author of one book and over 200 publications on the topics of astrophysics and various forms of astronomy including optical, radio, ultraviolet, and X-ray.
[3][4] He initially joined the Johns Hopkins University Physics Department in 1968 as the first JHU astronomer since 1908.
After a stint at NASA, he returned to help attract in 1981 the Space Telescope Science Institute to JHU, an organization that now employs 500, including 100 PhDs.
More recently he has attracted popular press for the SETI ecliptic search idea[5] and the Hanke–Henry Permanent Calendar.
He is cited for providing, for black holes that are rotating, and/or are electrically charged, the Kretschmann scalar, which characterizes their degree of curvature.