| 单词 | mean solar day |
| 例句 | For many years it was defined as 1/86,400 of a mean solar day. College Physics for AP Courses 2015-08-12T00:00:00Z A mean solar day contains exactly 24 hours and is what we use in our everyday timekeeping. Astronomy 2016-10-13T00:00:00Z As a result, our global standard of time, known as Coordinated Universal Time, or UTC, occasionally becomes misaligned with UT1—the marker used to measure the actual length of one mean solar day. As Earth's Spin Slows, Clocks Get Another Leap Second 2015-06-30T04:00:00Z A mean solar day — based on the time it takes the Earth to rotate once — is calculated to be 86,400 seconds. New York Today: Freedom From Foam 2015-06-30T04:00:00Z The length of the sidereal day is to the mean solar day as .99727 to 1, and various attempts have been made by trains of wheels to obtain this relation—but all are somewhat complicated. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" The mean solar days are all exactly the same length; they are equal to the length of the average apparent solar day; and they are each four minutes longer than a sidereal day. The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture The Second is the time of one swing of a pendulum making 86,164.09 swings in a sidereal day, or 1/86,400 part of a mean solar day. The Story of Electricity The sidereal day and the mean solar day necessitate some means of registering time, such as clocks; therefore the original day in use must have been the apparent solar day. The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture |
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