Al Globus has worked on space settlement, asteroid mining, Hubble, ISS, X37, Earth observation, TDRSS, cubesats, lunar teleoperation, spaceflight effects on bone, molecular nanotechnology, and space solar power publishing dozens of papers on these topics. In the 1970s there was a flurry of interest in free space settlements, giant spacecraft big enough to live in. However, these proposals were too big, too far away, too complex and too expensive to execute. He founded and runs the annual NASA Ames Space Settlement Student Design Contest for over 20 years. “Space Settlement: an Easier Way,”
by Al Globus, Stephen Covey, and Daniel Faber, NSS Space Settlement Journal
, July 2017 describes a relatively easy, incremental path to free space settlement by taking advantage of very low radiation levels in Equatorial Low Earth Orbit (ELEO) and the fact that people adapt to rotation rates of 4-6 rpm within a few days. Low levels of radiation in ELEO may permit settlements with little or no radiation shielding. Higher rotation rates permit much smaller settlements. Together this reduces settlement design mass by two to three orders of magnitude and places early settlements very close to Earth, radically reducing the difficulty of building the first space settlements and making launch from Earth practical, particularly if the SpaceX ITS effort succeeds.