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Taxonomy vs Gigayear - What's the difference?

taxonomy | gigayear |

As nouns the difference between taxonomy and gigayear

is that taxonomy is the science or the technique used to make a classification while gigayear is a billion (109) years.

taxonomy

English

(wikipedia taxonomy)

Noun

(taxonomies)
  • The science or the technique used to make a classification.
  • A classification; especially , a classification in a hierarchical system.
  • (taxonomy, uncountable) The science of finding, describing, classifying and naming organisms.

    • Synonyms

    * alpha taxonomy

    Derived terms

    * folk taxonomy * scientific taxonomy

    See also

    * classification * rank * taxon * domain * kingdom * subkingdom * superphylum * phylum * subphylum * class * subclass * infraclass * superorder * order * suborder * infraorder * parvorder * superfamily * family * subfamily * genus * species * subspecies * superregnum * regnum * subregnum * superphylum * phylum * subphylum * classis * subclassis * infraclassis * superordo * ordo * subordo * infraordo * taxon * superfamilia * familia * subfamilia * ontology

    gigayear

    English

    Noun

  • (en noun) (abbreviated as : Gyr)
  • A billion (109) years
  • *1967', Rankama, Kalervo, Institute of Geology and Mineralogy, University of Helsinki, Helsinki, Finland, ''Megayear and '''Gigayear : Two Units of Geological Time
  • *1982 , A. M. Clarke, Carboniferous Sedimentary Basins of Northern Europe and the Nature of Emergence around the Margins of the Mesozoic Rifted Sedimentary Basin of the North Sea'' in ''Philosophical Transactions of the Royal Society of London , 305(1489), pp207-208.
  • *:These syntheses gave a fresh geological, as opposed to solely geophysical, view of the up to multi-megayear and near gigayear mechanism responsble for the palimpsests of a general process of change in the upper crust: a process that we may observe, often apparently 'frozen' -- because it is so slow, at different steps in the process, in different places within the upper crust.
  • *1993 , Rosemary F.G. Wyse, The physical interpretation of morphology'', in J. Michael Shull and Harley A. Thronson, Jr., eds., ''The Environment and Evolution of Galaxies , p308
  • *:The illustrative example here provides for a few gigayear spread in ages of tracers of the stellar halo in a spiral (this is obviously sensitive to the chosen turnaround redshift) as found for the Milky Way field stars (Schuster & Nissen 1989) and globular clusters (reviewed by Bolte 1993).
  • *2002 , William Harris of McMaster University in Hamilton, Canada. (quoted on Astronomy.com)
  • *:It's hard to tell the difference between a 5-gigayear , 8-gigayear, and 10-gigayear cluster for such a sparse object as this unless you've got very high-quality photometry.
  • *2007 , Linda Siobhan Sparke & John S. Gallagher, III, Galaxies in the Universe , p343
  • *:The fraction could be as high as 100% if the nuclear activity lasts much less than a gigayear .

    • See also

    * kiloyear *megayear