Watch: A total solar eclipse
Learn about a total solar eclipse by observing it when it reaches totality.
Encyclopædia Britannica, Inc.
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© MinutePhysics (A Britannica Publishing Partner)Learn about Albert Einstein's 1905 paper on why light is a particle.
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Encyclopædia Britannica, Inc.Erik Gregersen, astronomy and space exploration editor, discusses space junk—material left floating in space after past space missions—and how the problem is getting worse every day.
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Encyclopædia Britannica, Inc.About 4.6 billion years ago, a nebula collapsed. The rest is history.Media Editor: Lauren Sims
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GSFC/NASAA brief overview of why solar eclipses are relatively uncommon events.
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Encyclopædia Britannica, Inc.A solar eclipse is a celestial phenomenon occurring when the Moon appears to block out the Sun.
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NASA Scientific Visualization StudioLearn about the total solar eclipse of April 8, 2024, by watching this NASA visualization of the Moon's umbra—the darkest part of the Moon's shadow—as it crosses North America.
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Encyclopædia Britannica, Inc.An overview of spatial relationships between the Sun, the Moon, and Earth during eclipses of the Sun and the Moon.
