astronomical time


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astronomical time

[‚as·trə′näm·ə·kəl ′tīm]
(astronomy)
Solar time in an astronomical day that begins at noon.
References in periodicals archive ?
Thus, in the spring, we move from astronomical time to summer time.
(b) The local terms are deducted respectively from the sequences of RT" and RL", thereby obtaining the purified astronomical time and latitude residual sequences RT and RL.
This allowed Lyons to accurately measure his new clock against the national standard of frequency, the quartz oscillators operated by NBS that were periodically calibrated against the astronomical time standards maintained by the U.S.
All residential outdoor luminaires that are not "high efficacy" must be controlled by a motion sensor and by either a photo-control or astronomical time switch.
This phase lasts for less than 100,000 years--a mere blink in astronomical time.
The dramatic successes in the development of astronomical time scales receive lots of emphasis, and appropriately so.
Many of these control systems have been designed to incorporate lighting control strategies important to sustainable design, such as astronomical time clock scheduling, real time monitoring and verification of lighting system performance, and integration of building management systems.
And today's start was delayed to let scientists' atomic clocks catch up with astronomical time.
About the only astronomical time period to which the week roughly corresponds is the period occurring between the four major lunar phases; there are approximately seven days from new moon to first quarter moon, from the first quarter moon to full moon, and so on.
Contract notice: Replacements of the clock systems for a single astronomical time at the metro stations "obelia", "lyulin", "konstantin velichkov", "opalchenska" and "serdika 1"
Astronomical time clock controls enabled both the incumbent and the new wall packs to shut off when sufficient daylight was available (12 hours, 14 minutes on the day this data sample was taken).
Wright's team's work has proven, for the first time, that the Ruprecht 147 cluster is only a bit younger than the Sun on the astronomical time scale.

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