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The Moon.
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NASA.

Motion of the Moon

The Moon is one of the largest celestial objects in our sky. We are so accustomed to its motions that it may go unnoticed for long periods of time. Many people are unaware that the Moon is visible during the day at certain times.

Yet the Moon has a daily influence on our lives. Even though it is small, it is close to us and its gravity causes the ocean tides. We use its orbit to define a fundamental unit of time for us: the month. And its phases continually remind us of the ongoing circle dance of the Earth, Moon, and the Sun.

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The Summer 2010 issue of The Earth Scientist, available in our online store, includes articles on rivers and snow, classroom planetariums, satellites and oceanography, hands-on astronomy, and global warming.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA