lunar day


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lunar day

The rotation period (27.322 Earth days) of the Moon, equal in length to the sidereal month. The Moon is thus in synchronous rotation with the Earth. See also libration.

lunar day

[′lü·nər ′dā]
(astronomy)
The time interval between two successive crossings of the meridian by the moon.
References in periodicals archive ?
Time series covered by logbook data The CPCA indicated that lunar day represented only 13.
None of the other four species analyzed appeared to be affected by the lunar day (Fig.
The three other crabs had one peak in activity each lunar day (Fig.
The average free running period length was close to that for a lunar day and the average time of peak activity was 0.
A day before Diwali, on the thirteenth lunar day, gold jewellery, silver utensils or other precious items are bought.
If the first crescent is at some point sighted too early, before twenty-nine days have passed, or too late, a couple days after lunar day 1, those deciding for village, town, or country can easily correct the problem by their particular choices of 29-day or 30-day months.
3) Horn and Wood then assume that the lunar day lasted from evening to evening and the Egyptian day from morning to morning.
Our findings suggest a solar driven cycle in which layers of water only a few molecules thick form, dissipate and reform on the surface each lunar day," she said.
O'Brien's analysis shows that after dust had collected on the detector and as the solar incidence angle decreased over the course of the lunar day, the electrostatic forces holding the dust to the detector's vertical silicon surface weakened, and the dust began to fall off due to gravity.
Now, a study reveals that forces compelling lunar dust to cling to surfaces, change during the lunar day with the elevation of the sun.
The mustard plant can grow from seed to flower over the course of a single lunar day, or two Earth weeks.
Special "I Was There" badges will be distributed to veterans of the lunar days.