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Extreme Ultraviolet Variability Experiment
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Extreme Ultraviolet Variability Experiment

scientific research instrument
Also known as: EVE
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Quick Summary

The Extreme Ultraviolet Variability Experiment (EVE) is an instrument aboard the U.S. satellite Solar Dynamics Observatory (SDO). Launched in 2010, the SDO studies the Sun and its effects on Earth's space weather. EVE's primary function is to measure the Sun's energy output in extreme ultraviolet (EUV) wavelengths every 10 seconds. This allows for the observation of solar changes that were previously undetectable. The EUV region is defined as being between approximately 100 and 1,000 angstroms. The Extreme Ultraviolet Explorer (EUVE), a previous satellite, surveyed the sky in the EUV region between 1992 and 2001, detecting 801 objects and observing the coronae of nearby stars.12

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2 Britannica Sources
  1. Extreme Ultraviolet Explorer
  2. Solar Dynamics Observatory

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