Historic Eclipse Flight: How Engineers Modified a Supersonic Concorde to Chase the Moon's Shadow

In June 1973, a team of international astrophysicists achieved a pinnacle in observational astronomy by modifying a prototype Concorde supersonic airliner to chase the shadow of a total solar eclipse across the African continent. Flying at an altitude of 57,000 feet at Mach 2.05, Concorde 001 matched the velocity of the Moon's umbral shadow. Engineers installed rooftop optical quartz portholes and specialized coronal cameras, enabling researchers to observe the Sun's mysterious outer corona continuously for 74 minutes—compared to the typical 7 minutes achievable from ground observatories.

The dataset collected during the historic supersonic flight provided groundbreaking insights into coronal heating dynamics and solar wind acceleration that continue to inform modern space weather research.