1991
April 5
The Compton Gamma Ray Observatory launches from the space shuttle Atlantis.
April 22–24
The workshop on Towards Other Planetary Systems (TOPS): A Technology Needs Assessment is held at LPI. Convened by David Black and Kenji Nishioka, the purpose of the workshop is to identify and document key technology issues associated with the TOPS program in general, and with some of the candidate observational facilities specifically.
June 24–28
The International Conference on Asteroids, Comets, Meteors 1991 is held in Flagstaff, Arizona. The LPI provides co-sponsorship and administrative, logistical, and publications support.
September 23–25
The workshop on Martian Surface and Atmosphere Through Time (MSATT) is held in Boulder, Colorado, signaling the start of the MSATT Study Project.
October 10
Galileo makes the first spacecraft flyby of an asteroid, passing within 16,200 km of Gaspra.
November 15–17
LPI hosts a Girl Scout Science Education Workshop on Youth and Space: A Science Experiment. Co-sponsors include the JSC Astronomy Club and the NASA Johnson Space Center.