UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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less than 28 days
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more than 28 days
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about 28 days
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None of the above
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Detailed explanation-1: -The length of a lunar month is roughly 28 days. If the moon were located farther from the Earth than it presently is, the lunar month would be: a. more than 28 days.
Detailed explanation-2: -In English common law, a “lunar month” traditionally meant exactly 28 days or four weeks, thus a contract for 12 months ran for exactly 48 weeks.
Detailed explanation-3: -The moon goes around the earth in every 28 days. Therefore we can see the shapes of the full moon, new moon and crescent moon in every 28 days.
Detailed explanation-4: -The Moon takes about one month to orbit Earth (27.3 days to complete a revolution, but 29.5 days to change from New Moon to New Moon). As the Moon completes each 27.3-day orbit around Earth, both Earth and the Moon are moving around the Sun.
Detailed explanation-5: -However, because the Earth is constantly moving along its orbit about the Sun, the Moon must travel slightly more than 360° to get from one new moon to the next. Thus, the synodic month, or lunar month, is longer than the sidereal month. A sidereal month lasts 27.322 days, while a synodic month lasts 29.531 days.
Detailed explanation-6: -The period from one new moon to the next is of 28-30 days is called the lunar month.