PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY
Solar eclipse astronomy. Amateur astronomer making notes besides his telescope during a total solar eclipse. The Sun should never be observed directly through a telescope, as this can damage the eyes and cause blindness, but a telescope can be used to record or project an image of the Sun. Solar eclipses occur when the Moon passes across the Sun as seen from Earth. This only occurs at New Moon, and is most commonly a partial eclipse. Sometimes, usually less than once a year, a total solar eclipse takes place. This happens when the Moon passes directly in front of the Sun, and, for a few minutes, the corona, the Sun's atmosphere, becomes visible. Photographed on 21 June 2001, in Sumbe, Angola.
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