An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The → sidereal time with respect to the → true equinox.

→ true; → sidereal; → time.

A sequence of measurements of the same variable collected over time. Most often, the measurements are made at regular time intervals.

→ univariate; → time; → series.

A measure of time that conforms, within a close approximation, to the mean diurnal motion of the Sun and serves as the basis off all civil timekeeping. The local civil time for a position on the Greenwich meridian.

→ universal; → time.

Sale as → Coordinated Universal Time (UTC).

→ Coordinated Universal Time (UTC).