Second - related articles and key terms

Related articles: Clock face   Centimetre gram second system of units   International System of Units   SI base unit   Orders of magnitude (time)   Metre   Becquerel   Ampere   Minute   International Atomic Time   Leap second   Atomic clock   Julian year (astronomy)   Caesium   Hertz   Tropical year   Time standard   Hour   Sexagesimal   Day   Time   Star

Key terms: second   atomic   clock   units   atomic clock   measured   hour   system of units   optical   definition   defined   minutes   caesium   motion   frequency   mean   astronomical   segundo   transition   trap   units of time   definition of the second   vacuum   international system of units   pendulum   free space   julian year   ground state   mechanical clock   sexagesimal   multiples   subdivided   atomic time   rotation   national physical laboratory   tropical year   leap second   si second   trapped ion   tables   epoch   microwave   iau   hyperfine   base unit   observations   astronomy   absolute zero   ephemeris time   lasting


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