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kyr is occasionally used in geology and astronomy as a unit of one thousand years or millennium. The "k" is the SI prefix for kilo or thousand, with "yr" simply an abbreviation for "year". The Blue Marble: The famous photo of the Earth taken en route to the Moon by Apollo 17s Harrison Schmitt on December 7, 1972. ... Radio telescopes are among many different tools used by astronomers Astronomy (Greek: αστρονομία = άστρον + νόμος, astronomia = astron + nomos, literally, law of the stars) is the science of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earths atmosphere (such as auroras and cosmic background radiation). ... The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... For the techno single by Moby, see Thousand (single). ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A millennium is a period of time, equal to one thousand years (from Latin mille, thousand, and annum, year). ... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple (supramultiple or submultiple). ...


Occasionally, the "k" is shown in upper case, as in "100 Kyr"; this is an incorrect usage. "kyr" itself is often considered incorrect, with some preferring to use "ky", as "y" is considered the proper abbreviation for year. Majuscules or capital letters (in the Roman alphabet: A, B, C, ...) are one type of case in a writing system. ...


See also

Myr is often used in geology as a unit of one million years. ... The Belarusian Ruble (ISO code: BYR) is the currency of Belarus. ...

External links


  Results from FactBites:
 
eccentricity is ruled out (5498 words)
In the Milankovitch theory, the peak near 0.01 (100 kyr period) is attributed to eccentricity, the peak near 0.024 (41 kyr period) to obliquity, and the peak near 0.043 (23 kyr period) to precession.
The region of the 100 kyr peak for the delta18O data is replotted in figures 2A and 2B with an expanded frequency scale.
Unlike the 400 kyr cycle, which is far enough mismatched from the 100 kyr to be suppressed (at least in principle) by the models, the 95-125 doublet peaks are too close.
LBL-35665.html (2419 words)
The 70 kyr precession of the vector (in the invariable plane), when measured in a coordinate system in which it is not centered (the frame of 1850), becomes mixed into the inclination to yield the apparent 70 kyr nutation.
We hypothesize that the 100 kyr variation in the orbital inclination is the dominant one seen in the climate data, rather than the 100 kyr period of eccentricity.
The presence of the 70 kyr "anomalous" peak is related to another previously ignored orbital frequency, that of the orbital precession Omega.
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