George Greenstein
Astrophysicist / Educator / Writer
Sidney Dillon Professor of Astronomy Emeritus at Amherst College
Astrophysicist / Educator / Writer
Sidney Dillon Professor of Astronomy Emeritus at Amherst College
Conventional rocketry cannot do the trick. We need new technology
They’ve got me stumped -- how about you?
The incessant talker can be a problem