NSS Board Member Al Globus Provides Updates on Space Settlement Research

Al GlobusLast year National Space Society Board of Directors member Al Globus released three pre-prints that together suggested a radically easier path to space settlement. A major part of this is the discovery that space settlements in Low Earth Orbit very close to the equator (ELEO) will experience far less radiation than any other location—so little that dedicated shielding may be unnecessary. This massively reduces the mass of space settlement designs (roughly two orders of magnitude).

The paper focused on radiation has now been substantially revised incorporating information from a number of NCRP (National Council on Radiological Protection and Measurement) publications. The bottom line recommendations have not changed, however. This paper can be found at:

  • Orbital Space Settlement Radiation Shielding,” Al Globus and Joe Strout, preprint, June 2016. The major result of this paper is that settlements in low (~500 km) Earth equatorial orbits may not require any radiation shielding at all based on a careful analysis of requirements and extensive simulation of radiation effects. This radically reduces system mass and has profound implications for space settlement as extraterrestrial mining and manufacturing are no longer on the critical path to the first settlements, although they will be essential in later stages. It also means the first settlements can evolve from space stations, hotels, and retirement communities in relatively small steps.

These changes are also reflected in:

  • Space Settlement: An Easier Way,” by Al Globus, Stephen Covey, and Daniel Faber, June 2016 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 higher rotation rates. 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. The mass model used in this paper is available here as an Excel spreadsheet.

For completeness, here is the third paper although there have been no revisions:

  • Space Settlement Population Rotation Tolerance,” Al Globus and Theodore Hall, preprint, June 2015. This paper reviews the literature to find that space settlement residents and visitors can tolerate at least four, and probably six, rotations per minute to achieve 1g of artificial gravity. This means settlements can be radically smaller, and thus easier to build, than previously believed.

Share:

Facebook
Twitter
Pinterest
LinkedIn
National Space Society

National Space Society

Leave a Comment

Categories
future 1

Don't Miss a Beat!

Be the first to know when new articles are posted!

Follow Us On Social Media

JOIN THE
GREATEST ADVENTURE

Give The Gift Of Space: Membership For Friends and Family

Book Review

Archives

ISDC 2024:
A NEW SPACE AGE

International Space Development Conference May 23rd-26th, 2024

FEATURED BLOG

Image of Kalpana One space settlement courtesy Bryan Versteeg, spacehabs.com $32,000 in Cash Awards Given for Best Space-Related Business Plans — Deadline March 1, 2024

Category: Nonfiction Reviewed by: John J. Vester Title: Nuclear Rockets: To the Moon and Mars Author: Manfred “Dutch” von Ehrenfried Format: Paperback/Kindle Pages: 270 Publisher:

Partially Successful Flight Reached Space and Demonstrated New “Hot Staging” System The National Space Society congratulates SpaceX on the second test of its Starship/Super Heavy

Ad Astra, the NSS quarterly print, digital, and audio magazine, has won a 2023 MARCOM Gold Award. The awards are given yearly for “Excellence in

By Jennifer Muntz, NSS Member Coordinator On October 10th, an inspiring breakfast event took flight at the Center for Space Education at the Kennedy Space

By Grant Henriksen NSS Policy Committee Benefit sharing is a concept that refers to the distribution of benefits derived from the exploration and use of

People residing and working in space, space settlements, or on long-duration space flights will need to produce infrastructures and food to maintain healthy lifestyles. The

Image: Artist’s concept of the Blue Moon lander. Credit: Blue Origin. Second Human Landing System Contract Encourages Competition and Innovation The National Space Society congratulates