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• Uranium
  ...sotope of uranium is ²³⁵U, that is more radioactive with a half life of 7.04×10⁸ years. ²³⁵U represents 0,72% of all Ur
  2 KB (228 words) - 12:44, 4 December 2020
• Greenhouse gases
  ...ively than carbon dioxide (CO2). People have estimated that it would cost half a billion dollars per year to warm the planet with such gases. (See the [[ ==Life Generated Greenhouse Gases==
  3 KB (552 words) - 18:25, 12 August 2022
• Ultraviolet
  ...om the Sun, so while the UV light is just as powerful per photon, there is half as much light. However, as the Martian atmosphere is very thin, more UV lig == UV Light Effects On Life ==
  3 KB (448 words) - 12:04, 30 September 2022
• The Eden Project
  ...estrial example of the possible use of large ''biomes'' as greenhouses and life support for Mars colonies. ''Image credit: Jürgen Matern]] ...structural strength necessary to maintain an internal gas pressure of one half a standard atmosphere against a vacuum. There is no such requirement for t
  1 KB (230 words) - 13:48, 17 December 2018
• Cosmic radiation
  ...alf the cosmic rays that you would in deep space. (The horizon blocks out half the sky, a bit more if you are in a valley.) Cosmic rays (and their [[Seco ...c rays is impossible and futile. But habitats with a meter of water (or a half meter of soil) between people and the sky would reduce this radiation to le
  10 KB (1,660 words) - 22:07, 26 April 2024
• Potassium
  ...ope is ³⁹K. ⁴⁰K is a radioactive isotope with a half life of 1.248×10⁹ years. It's abundance can be measured remotely.
  2 KB (322 words) - 07:01, 22 June 2021
• Waste biomass recycling
  ...s use for food production have, on average, half their mass as biomass and half their mass as food. So food production also produces similar quantities of
  4 KB (619 words) - 10:17, 27 April 2023
• Carbon
  Massive stars (more than about half a solar mass) are capable of burning helium in the so-called triple-alpha p ...name="LopezSchneiderDanchi">B. Lopez, J. Schneider & W.C. Danchi - '' Can Life Develop in the Expanded Habitable Zones around Red Giant Stars? '' 2005. Th
  5 KB (795 words) - 05:39, 23 June 2021
• LFTR
  ...items which are in-between these two extremes. Isotopes with medium half life are radioactive enough to be too dangerous to spend much time with, but the ...atinum are quite rare fission products.) Fission products have very short half lives so they are wildly, ferociously radioactive. If you touched such was
  15 KB (2,551 words) - 16:32, 3 November 2022
• Sunlight
  ...h, leaving too much UV ray and high energy particles to reach the surface. Life directly on the Martian surface is considered unlikely without additional s ...is 590 W/m3, while the Earth solar constant is 1350 W/m2. Mars gets about half the sunlight Earth does. The Martian atmosphere is dusty; the usable energ
  3 KB (506 words) - 12:24, 13 February 2023
• Crew 192 Journalism Reports
  ...y tradition when a sailor was hired for a cruise the captain would pay him half of his wages upfront and tell him to go mind his p’s and q’s…. mindin ...th festivities. In old days they would burn a wooden horse as a gesture of half way complete.
  8 KB (1,405 words) - 19:29, 7 March 2019
• Oxygen
  ...found in the [[atmosphere]] and in most [[minerals]] on [[Mars]]. Almost half of the mass of the Martian crust is Oxygen, bound up in various minerals. O =Relevance for life=
  9 KB (1,353 words) - 14:12, 27 November 2023
• Magnetosphere
  ...of radiation poisoning. The thick Earth's atmosphere completely protects life from these electrons, protons, and alpha particles. These VanAllen Belts a ...s' surface will be half of what it is in deep space (Mars' mass blocks out half the sky), but no reasonable amount of shielding (and no tiny magnetic bubbl
  8 KB (1,217 words) - 09:01, 27 May 2022
• Mars Odyssey
  ...cm is ice. In other words, one bucket of that material would contain one half bucket of ice.<ref>http://mars.jpl.gov/odyssey/newsroom/pressreleases/20020 ...st-life.html New Scientist: Chloride salts on Mars may have preserved past life]</ref> <ref>[http://news.bbc.co.uk/1/hi/sci/tech/7302591.stm BBC: Mars is
  9 KB (1,367 words) - 16:17, 13 October 2021
• Crew 202 Sol Summaries
  ...fter sharing some of our daily routine with our guest, we went back to our life as Martians, and spent the afternoon working and cleaning the habitat. Summary Title: Half-way
  24 KB (4,065 words) - 14:56, 7 March 2019
• Thorium
  Note that Thorium has a very long half life of 14 billion years, so the majority of the thorium that existed when the E ...um 233. This immediately beta decays to protactinium 233 which has a half life of 27 days. Pa233 beta decays into U233.
  12 KB (1,933 words) - 12:08, 29 November 2022
• In-situ resource utilization
  ...rce of carbon, used for fuel production (CH4) and an essential element for life. Carbon dioxide also serves as a source of oxygen for the settlement atmos ...ction (CH4) and for the synthesis of hydrocarbons, the building blocks for life.
  11 KB (1,619 words) - 07:58, 24 February 2022
• Radiation shielding
  ...are delivery'' - J.S. Logan, in S.E. Churchill ed. ''Fundamentals of space life sciences, Volume 1'' - 1997, ISBN 0-89464-051-8 pp. 154-156.</ref>. With th Another common way of evaluating radiation shielding is to use the '''half value,''' that expresses the thickness of absorbing material which is need
  21 KB (3,128 words) - 09:07, 27 May 2022
• Crew 194
  ...n. Phillip enjoys staying fit for his adventures by training for whatever half-marathon is next on the calendar. ...n practicing in Allen, TX (just north of Dallas). While initially starting life as a computer scientist, he ultimately changed direction and went on to rec
  6 KB (925 words) - 18:40, 7 March 2019
• Mars Reconnaissance Orbiter
  MRO took seven and a half months to reach Mars. Although four trajectory corrections were planned and Aerobraking began on March 30, 2006. This three-step process only needed half the fuel to reach a lower, more circular orbit with a shorter period. Durin
  11 KB (1,695 words) - 15:12, 6 September 2019

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