Rare solar eclipse types

Details Rare solar eclipse types Rare solar eclipse types

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979s%26w....18...16h&link_type=abstract

Sterne und Weltraum, vol. 18, Jan. 1979, p. 16, 17. In German.

Astronomy and Astrophysics

Astronomy

Astrodynamics, Earth-Moon System, Solar Eclipses, Distance, Lunar Limb, Periodic Variations

Scientific paper

Two or more (in rare cases as many as five) solar eclipses are observed on earth every year. However, solar eclipses for a particular point on earth occur much more rarely. The average interval between two such events is about half a century. The relation between the position and the size of the moon and the occurrence and characteristics of solar eclipses is considered. It is found that only total solar eclipses would be observed if the distance between earth and moon were reduced by approximately 10 percent. Only annular eclipses would occur if the distance of the moon were about 6 percent greater. It is pointed out that a sharp distinction between total and annular eclipses can only be made from a mathematical point of view. However, the limb of the moon is not an ideal circle, but a line characterized by mountains and valleys. These relations give rise to the observation of Baily's beads.

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