On moons

Although the terms exobiology and astrobiology really mean the same thing, astro-biology , introduced by NASA in 1995, has become the one of choice. This branch of science reaches from cosmochemistry via biogenesis to all the other themes involving research on traces of life (of whatever sort) on planets and on moons, both within and outside our solar system. 

President s Commission on Moon, Mars, and Beyond. Available online at www. moontomars.org. 

MoS2 with Mo and Ta Surveyor DC motor brushes on moon landing vehicles... 

Pair refers paired meteorites from the same locality. Mass is the recovered mass. Z)2a-is the depth at which irradiation on the Moon took place. 72 is the duration of the lunar irradiation. / 4 isthe radius of the meteoroid while in transit to Earth. 74 is the duration of transit to Earth. Ti is the terrestrial age. (i) Greshake et al. (2001) note similarities to MAC 88104/5. (ii) Assume density 2.7 g cm. (iii) T2tt before compaction, (iv) Full model has three stages on Moon. References (a) Eugster and Lorenzetti (2001). (b) Nishiizumi and Caffee (2001a). (c) Warren (1994). (d) Nishiizumi and Caffee (2001b). (e) Shukolyukov et al. (2001). (f) Scherer et al. (1998). (g) Nishiizumi et al. (1998). 

Bandermann L. W. and Singer S. F. (1973) Calculation of meteoroid impacts on Moon and Earth. Icarus 19, 108-113. Beard B. L., Taylor L. A., Scherer E. E., Johnson C. M., and Snyder G. A. (1998) The source region and melting mineralogy of high-titanium and low-titanium lunar basalts deduced from Lu-Hf isotope data. Geochim. Cosmochim. Acta 62, 525-544. 

Warren P. H. (1989) KREEP major-element diversity, trace-element uniformity (almost). In Workshop on Moon in Transition Apollo 14, KREEP, and Evolved Lunar Rocks (Technical Report 89-03) (eds. G. J. Taylor and P. H. Warren). Lunar and Planetary Institute, Houston, pp. 149-153. 

Further species identified in the lunar and/or Hermean exosphere are hydrogen (Mercury only), sodium and potassium, and possibly (on Mercury only) oxygen (see cited review articles). For various other species upper limits have been reported. The nondetection of H on Moon is unexplained, and it is certainly possible that undetected... 

SI Surface Ops Crew members stranded on Moon/Mars surface during EVA (Extra Vehicle Activity) 4 3 3... 

Morring, F., Jr. 2004b. Reality bites cost growth on shuttle retum-to-flight job eats NASA s lunch on Moon/Mars exploration. Aviation Week and Space Technology July 26, 52. 

Apr. 1967 NASA Surveyor 3 Soft landing on Moon. Photographs. Soils. 

Anorthosites are found on the terrestrial continents, but only in relatively old (Precambrian) terranes. Unlike the other rocks discussed, anorthosites are not still being produced today. Might their appearance in terrestrial Precambrian terrains indicate that crust forming processes analogous to those on Moon occurred also on Earth ... 

Uranus has also a ring system (see Fig. 3.16) which consists of very dark particles (the size of the particles ranges from micrometers to several dm). It seems that the rings are young maybe they were formed by impacts on moons of Uranus where matter was shattered. 

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