20 Terms
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Moon
The Earth's only natural satellite. The moon has a cold, dry orb covered with many lunar craters and strewn with rocks and dust. The moon has no atmosphere. But recent lunar missions have found plenty frozen water on the moon.
Industry: Astronomy
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Moon
Terminator
Astronomy; Moon
The line which delimits night (shadowed portion) and day (sunlit portion) on a celestial body. The Moon's phases illustrate this.
Sidereal month
Astronomy; Moon
A lunar month measured by a return to a specific position marked by a certain star: a period of 27. 32166 days.
Spring tide
Astronomy; Moon
The highest tides in a lunar month, occurring near new and full moons, when the Earth, Sun, and Moon are aligned.
Selenology
Astronomy; Moon
The science dealing with the study of the Moon. From the Greek goddess, Selene.
Solar eclipse
Astronomy; Moon
An eclipse caused when the Moon comes directly between the Earth and the Sun, temporarily blocking out Sun's disc in the sky.
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