Number 135 (Story #4), July 1, 1993 by Phillip F. Schewe and Ben Stein EXPECTED DEVELOPMENTS AND DISCOVERIES IN ASTRONOMY over the next twenty years include the return of humans to the Moon, a consensus on a value for the Hubble Constant, the launch of an 8-meter orbiting optical telescope, rock samples returned from Mars, a mission to Pluto, the observation and study of mature planetary systems around nearby stars, and the imaging of the surfaces of other stars. These are some of the predictions offered by various scientists in the 20th anniversary issue of Astronomy Magazine. Many of those asked were less certain about establishing the nature of dark matter or unequivocally demonstrating the existence of black holes. (Astronomy, Aug 1993.)