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Ancient humans must have found eclipses unnerving and unpredictable. Periodically, they are not easy to understand because of their complex nature. It is both dramatic and transient when a solar eclipse takes place. Due to diffraction on the moon's surface and its jaggedness, a solar eclipse appears to remove the sun from the sky as the sun disappears. However this simple explanation has fascinated humans for thousands of years. Shrouded in mystery...
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When the Earth's shadow covers the sun's light, which would normally reflect off the moon, a lunar eclipse occurs. Total lunar eclipses, partial lunar eclipses, and penumbral lunar eclipses are the most spectacular, with the Earth's shadow totally covering the moon. Throughout history, eclipses have impressed awe and even worry, particularly once total satellite eclipses turned the moon chromatic. NASA maintains a list of predicted lunar eclipses...
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Stars. Massive gaseous bodies that radiate light derived from their internal sources. Only a very small percentage of the trillions of stars that make up the observable universe are visible with the naked eye. Several stars form pairs, multiple systems, or constellations. The members of such stellar groups have a common origin and are bound together by their mutual gravitational attraction. In some ways, star clusters and stellar associations are...
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