Colonization of the asteroids

Colonization of the asteroids

The asteroids have long been suggested as possible sites for human colonization. This idea is popular in science fiction. Asteroid mining, a proposed industrial process in which asteroids are mined for valuable materials, especially platinum group metals, may be automated or require a crew to remain at the target asteroid.



Space colonization
This box: view · talk · edit
  • Low gravity greatly reduces the cost and risk of "landing" compared to the much deeper gravity wells of the Moon or Mars, and simplifies construction technologies (such as cranes) and reduces structural strength requirements
  • Large number of possible sites, with over 300,000 asteroids identified to date
  • Asteroids' chemical composition varies (see asteroid spectral types), providing a variety of materials usable in building and fueling spacecraft and space habitats. The Trojan asteroids, in Jupiter's orbit, may be primarily extinct comets.
  • Some Earth-crossing asteroids require less energy (delta-V) to reach from Earth than the Moon.
  • Material mined from asteroids could be a basis for a trade economy, and precious metals may even be returned to Earth or other colonized worlds from asteroid mines for economic gain.
  • High surface/volume ratio enables effective exploration and exploitation of mineral resources and provides maximal portion of useful building ground on the surface and interior.
  • High vacuum and low gravity would facilitate the evolution of some hi-tech industries such as material engineering and physical electronics (crystal growth, epitaxy).
  • Many asteroids (especially the extinct comet cores) contain large amounts (more than 5% of total composition) of water and other volatiles, as well as carbon, which are all necessary for life support.
  • Isaac Asimov pointed out the advantage of building cities inside hollowed out asteroids, since the volume of all the asteroids put together is a great deal more than that of a mile-high building covering the Earth would be, and thus could accommodate a large population.


  • Low gravity. Humans would have to adapt, or some form of artificial gravity would have to be implemented.
  • Most asteroids are far from the Sun. The main asteroid belt is roughly 2 to 4 times further from the Sun than Earth. This means that the available solar energy (solar constant) is 4 to 16 times less, although building large reflectors to collect sunlight is possible in space.
  • Many asteroids may merely be loose agglomerations of dust and rocks, which may be very difficult to use.
  • Asteroids are vulnerable to Solar radiation, lacking similarities like Earth's ozone layer and magnetosphere (though some may have a magnetic field, they are bound to be considerably weaker by comparison). Shielding with several meters of asteroidal regolith is a trivial solution to this problem.
  • Asteroids have no or very little atmosphere.
  • Smaller objects may collide with the asteroid and cause significant damage.

Asteroids of special interest

Asteroid 243 Ida is over 53 km long. Its moon, Dactyl on the right

Some C-type asteroids are likely carbonaceous chondrites, which are some tens of percent water by mass.

Asteroid colonies in science fiction

See Asteroids in fiction.


See also

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Colonization of the outer Solar System — Space colonization Solar System Inner Mercury Venus Earth Moon Lagrange points Mars Phobos Deimos Asteroids Ceres Outer Jupiter Io …   Wikipedia

  • Colonization of the Moon — Lunar outpost redirects here. For NASA s plan to construct an outpost between 2012 and 2024, see Lunar outpost (NASA). Moonbase redirects here. For other uses, see Moonbase (disambiguation). 1986 artist concept The colonization of the Moon is the …   Wikipedia

  • Colonization of the inner Solar System — Space colonization Solar System Inner Mercury Venus Earth Moon Lagrange points Mars Phobos Deimos Asteroids Ceres Outer Jupiter Io …   Wikipedia

  • European colonization of the Americas — First colonization British colonization Courlandish colonization Danish colonization Dutch colonization …   Wikipedia

  • Mining the Sky: Untold Riches from the Asteroids, Comets, and Planets — is a book by John S. Lewis which discusses the development of interplanetary space within our solar system. Lewis makes a prediction that the abundant natural resources of the solar system, including effectively limitless solar energy, could… …   Wikipedia

  • Asteroids in fiction — Asteroids and asteroid belts are a staple of science fiction stories.Asteroids play several potential roles in science fiction: as places which human beings might colonize; as resources for extracting minerals; as a hazard encountered by… …   Wikipedia

  • Colonization on Earth — The colonization on Earth includes: Colonization in Europe Colonization of the Americas Colonization of Africa Colonization of Asia Colonization of Oceania Antarctica Ocean colonization See also Space colonization Colonies in antiquity… …   Wikipedia

  • Colonization of Mars — An artist s conception of the colonization of Mars, with a cutaway showing part of the interior The colonization of Mars by humans is the focus of speculation and serious study because the surface conditions and availability of water on Mars make …   Wikipedia

  • Colonization — For other uses, see Colonization (disambiguation). World empires and colonies 2007 Colonization (or colonisation) occurs whenever any one or more species populate an area. The term, which is derived from the Latin colere, to inhabit, cultivate,… …   Wikipedia

  • Colonization of Venus — Venus The colonization of Venus has been a subject of much speculation and many works of science fiction since before the dawn of spaceflight, and is still much discussed. With the discovery of Venus hostile surface environment, attention has… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.