Astronomy & Space

APOD: 2026 September 5 – Chasing the Moon’s Shadow

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Solar eclipsesAtmospheric scienceHigh-altitude rese…

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On August 12, NASA's WB-57F high-altitude research aircraft flew at 50,000 feet along the path of totality during a total solar eclipse off the coast of Iceland to observe the Moon's shadow. The aircraft carried high-resolution cameras to record eclipse data from above atmospheric interference including clouds, dust, and water vapor that typically degrade ground-based observations. The cockpit video captured the solar corona at the beginning of totality, with Venus, Jupiter, and Mercury visible in the darkened sky, while the horizon remained bright beyond the reach of the Moon's shadow.


High-altitude eclipse observations allow scientists to collect clearer data on the solar corona and conduct research that would be impossible from ground level due to atmospheric distortion. This method demonstrates how specialized aircraft can extend observation opportunities and improve the quality of astronomical measurements during rare celestial events.


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A solar eclipse as viewed by a pilot from an aircraft cockpit.

Chasing the Moon’s Shadow

Explanation: Chasing the shadow of a New Moon, NASA’s WB-57F high altitude research aircraft took to the skies off the coast of Iceland on August 12 to observe a total solar eclipse. At 50,000 feet the aircraft was piloted along the precisely determined path of totality to maximize its time in the Moon’s shadow. A suite of high-resolution cameras on board was able to record eclipse data from above the clouds, dust, and atmospheric water vapor that interfere with observations made closer to the ground. This view from the cockpit, taken from an inflight video, captures the solar corona emerging at the beginning of totality. The sky appears dark in the shadow of the Moon. Venus is shining left of center in the video frame, while Jupiter and Mercury are just visible to the right of the eclipsed Sun. But the sky is bright along the distant horizon below, beyond the reach of the Moon’s shadow.

APOD’s main NASA site is moving: From apod.nasa.gov to science.nasa.gov/apod
Tomorrow’s picture: enhancing Pluto

Date September 5, 2026
Credit: NASA
Authors & editors: Jerry Bonnell, Cecilia Chirenti, Robert Nemiroff, Keighley Rockcliffe
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

Source: APOD: 2026 September 5 – Chasing the Moon’s Shadow