time standard
specification for measuring time
local mean time
form of solar time that corrects the variations of local apparent time, forming a uniform time scale at a specific longitude
Terrestrial Time
time standard for astronomical observations from the Earth
lunar time
proposed approaches to tracking date and time on the Moon
Greenwich Mean Time
time standard
solar time
calculation of elapsed time by the apparent position of the sun
Earth time
time standard
Heliocentric Julian Day
Julian Date corrected for differences in the Earth’s position with respect to the Sun
sidereal time
time standard
Geocentric Coordinate Time
time standard used in astronomy
GPS time
time standard
dynamical time
time standard
dynamical time
time standard
universal time
time standard based on the slowing rotation of the Earth
British Summer Time
identifier for a time offset from UTC of +1
Coordinated Universal Time
principal time standard that underlies civil times on Earth
International Atomic Time
time scale based on atomic clocks
Mission Elapsed Time
time scale used by NASA during their space missions
olympiad
period of four years associated with the Olympic Games of the Ancient Greeks
Martian time
proposed approaches to tracking date and time on the planet Mars
time zone
region on Earth that has a uniform standard time for legal, commercial, and social purposes
Unix time
system for identifying instants in time; the number of seconds that have elapsed since the UTC midnight before 1 January 1970, ignoring leap seconds
civil time
standard for the measurement of time in some given area, which allows determining which conventional timezone to apply locally and usually to the social and civil life
ephemeris time
time standard