Eclipse
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An eclipse is an astronomical event which occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it
Totality during the solar eclipse of August 11, 1999, showing the solar corona and prominences
The lunar umbra on Earth during the solar eclipse of August 21, 2017, as seen from space
The progression of a solar eclipse on August 1, 2008, viewed from Novosibirsk, Russia. The time between shots is three minutes.
This print shows Parisians watching the solar eclipse of July 28, 1851
Syzygy (astronomy)
Videos
In astronomy, a syzygy is a roughly straight-line configuration of three or more celestial bodies in a gravitational system.
Eclipse
…passing into the shadow of another body or by having another body pass between it and the viewer. This alignment of three celestial objects is known as a syzygy. An eclipse is the result of either an occultation (completely hidden) or a transit (partially hidden). A "deep eclipse" (or "deep occultation") is…
A syzygy occurs during eclipses (numbers 1, 2, 3, 4).
Jupiter (top), Venus (lower left), and Mercury (lower right) above La Silla Observatory, Chile (May 26, 2013)
Apparent planetary alignment involving Mercury, Venus, Mars, and Jupiter; the Moon is also shown, as the brightest object.
Full Moon 2010