Nasa is deploying a specialized research aircraft to intercept a total solar eclipse, using high-altitude flight to extend the duration of totality and capture high-resolution solar data. By flying a WB-57 aircraft at 50,000 feet along the eclipse path, researchers aim to observe solar phenomena—including nanoflares and plasma prominences—that are otherwise obscured by the sun’s intense glare.
Chasing Totality at 50,000 Feet
The mission involves two Nasa aviators piloting a WB-57 research plane, departing from Keflavik, Iceland. According to Nasa, the aircraft will cruise at 50,000 feet, positioning itself to meet the moon’s shadow as it travels across the ocean at speeds exceeding 2,000 mph. By flying at 460 mph in the direction of the shadow, the crew can extend the period of totality to nearly three minutes, providing a longer window for scientific observation than is possible from the ground.
Did you know?
The WB-57 aircraft used for this mission is based on the English Electric Canberra, a Cold War-era tactical nuclear strike bomber originally designed for the Royal Air Force.
Capturing Solar Mysteries
Hidden within the nose cone of the aircraft are four cameras configured to capture dozens of images per second across multiple light wavelengths. Dr. Amir Caspi, the mission’s principal investigator at the Southwest Research Institute in Boulder, Colorado, notes that these observations are critical for studying nanoflares—magnetic explosions that release thousands of atomic bombs’ worth of energy. These flares are key to understanding why the sun’s outer atmosphere, the corona, reaches temperatures exceeding 1,000,000°C, while the surface remains significantly cooler at 6,000°C.
Comparing Airborne and Ground Observation
The choice to use aircraft for eclipse research addresses limitations inherent in other observation methods. Ground-based stations are frequently hampered by cloud cover and atmospheric interference. Conversely, while space-based cameras are free from atmospheric distortion, they are limited by data transmission bandwidth. According to Dr. Caspi, the aerial mission generates terabytes of high-fidelity data that would be difficult to relay from space.
| Observation Platform | Primary Advantage | Primary Constraint |
|---|---|---|
| Ground | Accessibility | Weather/Clouds |
| Space | Clear view | Data bandwidth |
| Aircraft | Mobility/Extended totality |
The Experience of High-Altitude Eclipses
Cary Klemm, a sensor equipment operator at Nasa’s Johnson Space Center who has participated in previous eclipse flights, describes the event as a sudden transition. “There are no clouds above you, and then all of a sudden, you’re hit with this slam of shadow,” Klemm stated. He noted that the experience involves a noticeable drop in temperature and an eerie, wraparound shadow that requires pilots to adjust instrument lighting.
Frequently Asked Questions
- Why does Nasa use planes to study solar eclipses?
Planes allow researchers to stay within the path of totality longer than stationary observers and avoid potential cloud interference. - What are nanoflares?
They are small, powerful magnetic explosions on the sun that release massive amounts of energy and are believed to contribute to the high heat of the solar corona. - How fast does the moon’s shadow move?
The shadow travels across the Earth at speeds greater than 2,000 mph.
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