lower limit size
11Nanobacterium — Structures found on meteorite fragment Allan Hills 84001 Nanobacterium (pl. nanobacteria) is the unit or member name of a proposed class of living organisms, specifically cell walled microorganisms with a size much smaller than the generally… …
12cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …
13environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
14star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
15Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
16Extrasolar planet — Planet Fomalhaut b (inset against Fomalhaut s interplanetary dust cloud) imaged by the Hubble Space Telescope s coronagraph (NASA photo) …
17Dwarf planet — Not to be confused with Minor planet. Ceres as seen with the Hubble Space Telescope. It is the only dwarf planet in the asteroid belt …
18river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
19Reference range — Reference ranges edit in: blood urine CSF feces In health related fields, a reference range or reference interval usually describes the variations of a measurement or value in healthy i …
20Observable universe — For a general discussion of the universe, see Universe. Visualization of the 93 billion light year – or 28 billion parsec – three dimensional observable universe. The scale is such that the fine grains of light represent collections of large… …
