Pasachoff, Jay M. Hopkins Observatory, Williams College, Williamstown, Massachusetts.
Espenak, Fred Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, Maryland.
Last reviewed:March 2019
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- Solar Eclipses
- Positions and timing
- Scientific value
- Annular eclipses
- Recent and future eclipses
- Observing a solar eclipse
- Lunar Eclipses
- Future lunar eclipses
- Links to Primary Literature
- Additional Readings
The occultation (obscuring) of one celestial body by another. Solar and lunar eclipses take place at syzygies of the Sun, Earth, and Moon, when the three bodies are in a line. At a solar eclipse, the Moon blocks the view of the Sun as seen from the Earth (Fig. 1). At a lunar eclipse, the Earth's shadow falls on the Moon, darkening it, and can be seen from wherever on Earth the Moon is above the horizon. See also: Earth; Moon; Sun; Syzygy
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