Eclipses
When the EarthMoonand Sun line up in spacewe can see an eclipse. NASA studies eclipses from the groundin our atmosphereand in spaceinfluencing solarplanetaryand Earth science.
About Eclipses
An eclipse is an awe-inspiring celestial event that drastically changes the appearance of the two biggest objects we see in our sky: our Sun and Moon. On Earthpeople can experience solar and lunar eclipses when Earththe Moonand the Sun line up. Safety is the number one priority when viewing a solar eclipse. Be sure to follow these safety guidelines when viewing a solar eclipse.
Quick Facts
The next total solar eclipse visible in the contiguous United States will be on Aug. 232044.
Lunar eclipses occur during the full moon phaseand solar eclipses occur during the new moon phase.
We can't normally see the corona—the Sun's outer atmosphere — because Sun's surface below it is so much brighter. But during a total solar eclipsethe corona emergesoffering unique opportunities to study it.
An eclipse season is one of only two periods during each year when the Sunthe Moon and Earth are alignedallowing eclipses to occur. Each season lasts about 35 days and repeats just short of six months later!
The April 8 Total Solar Eclipse: Through the Eyes of NASA
On April 82024the Moon’s shadow swept across North Americatreating millions to a breathtaking view of a total…
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Eye Safety During an Eclipse
Observing our starthe Suncan be safe and inspirational.
Except for a specific and brief period of time during a total solar eclipseyou must never look directly at the Sun without proper eye protectionsuch as safe solar viewing glasses (eclipse glasses). Eclipse glasses are NOT the same as regular sunglasses; regular sunglasses are not safe for viewing the Sun. During a total solar eclipseyou must wear your eclipse glasses (or use other solar filters) to view the Sun directly during the partial eclipse phase. You can only take your glasses off during the short time when the Moon completely obscures the Sun – known as the period of totality. If you don’t have eclipse glassesyou can use an indirect viewing methodsuch as a pinhole projectorwhich projects an image of the Sun onto a nearby surface.
It is safe to look at the Moon with unprotected eyes or through a telescope during all types and during all stages of a lunar eclipse.
Citizen Science Projects
Observing a solar eclipse is one of many ways to get in on the fun of doing science.
You can get involved with NASA science by participating in a number of NASA-funded citizen science projects. Citizen science projects are collaborations between scientists and interested members of the public. Through these collaborationsvolunteers (known as citizen scientists) have helped make thousands of important scientific discoveries.
Know your eclipses!
There are four types of solar eclipses: Totalpartialhybridand annular.
The type of eclipse that people get to see depends on how the Moon aligns with Earth and the Sunand how far away the Moon is from Earth. There are three types of lunar eclipses: totalpartialand penumbral. At least two partial lunar eclipses happen every yearbut total lunar eclipses are rare. Unlike a solar eclipseit is always safe to look at a lunar eclipse with the naked eye.
Science of Eclipses
Eclipses aren’t just beautiful – they’re great for science.
In addition to inspiring artists and musicianseclipses have driven numerous scientific discoveries. For over a centurysolar eclipses helped scientists decipher the Sun’s structure and explosive eventsfind evidence for the theory of general relativitydiscover a new elementand much more. NASA scientists still study eclipses to make new discoveries about the SunEarthand our space environment. Total solar eclipses are particularly important because they allow scientists to see a part of the Sun’s atmosphere – known as the corona – which is too faint to see except when the bright light of the Sun’s surface is blocked.
History of the Eclipse
Eclipses have fascinated humans from the beginning.
Throughout timehumans have had different interpretations of and reactions to these striking celestial events. In facthistorical records of eclipses from scribes in AnyangChinahelped astronomers at NASA’s Jet Propulsion Laboratory to determine how Earth’s rotation has changed over time. Determining exactly when the eclipse was seen and where the Moon's shadow fell on Earth helped the scientists calculate the rate of Earth's spin. The eclipses they used for this research were in 1226 B.C.E.1198 B.C.E.1172 B.C.E.1163 B.C.E.and 1161 B.C.E.
April 82024
2024 Total Solar Eclipse
A total solar eclipse is seen in Dallas on MondayApril 82024.
A total solar eclipse swept across a narrow portion of the North American continent from Mexico’s Pacific coast to the Atlantic coast of NewfoundlandCanada. A partial solar eclipse was visible across the entire North American continent along with parts of Central America and Europe.
Eclipse Stories
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