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Total solar eclipse. The delicately structured glow of the solar corona—or solar atmosphere—seen during the March 7, 1970, total eclipse of the Sun. The corona is visible to the unaided eye only during an eclipse. Diagram showing the stages of a total and partial solar eclipse, with the Moon moving across the Sun. Each phase is illustrated step-by-step, from first contact through maximum coverage to last contact.
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Total solar eclipse. The delicately structured glow of the solar corona—or solar atmosphere—seen during the March 7, 1970, total eclipse of the Sun. The corona is visible to the unaided eye only during an eclipse.
Total solar eclipse. The delicately structured glow of the solar corona—or solar atmosphere—seen during the March 7, 1970, total eclipse of the Sun. The corona is visible to the unaided eye only during an eclipse.

A total eclipse occurs when one celestial body completely obscures another. In astronomy, this phenomenon involves three celestial objects aligning.12

A total solar eclipse happens when the Moon passes directly between the Sun and Earth, completely blocking the Sun's surface. This event is only visible from a narrow path on Earth, typically about 150 km wide. During totality, the Sun's chromosphere and prominences become visible, and the corona extends outwards. The duration of totality is brief, usually lasting only a few minutes.345

A total lunar eclipse occurs when the Moon moves entirely into Earth's shadow (the umbra). This can only happen during a full moon. While the Moon is in the umbra, it often appears reddish due to sunlight filtering through Earth's atmosphere.647

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  1. total solar eclipse
  2. total lunar eclipse
  3. eclipse - Solar eclipse phenomena
  4. totality
  5. total eclipse
  6. totalities
  7. lunar eclipse
  8. eclipse
  9. What Causes Lunar and Solar Eclipses?

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