The first photograph that demonstrates the Earth’s curvature was taken on Dec. 30, 1930, by U.S. Army Capt. Albert Stevens while he was flying at an altitude of 21,000 feet. The first image ...

Why do people believe the flat Earth theory and is it even worth debating? Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of Ask a Spaceman and Space ...

This altitude is where airplanes ... At this height, passengers could see the curvature of the Earth and the dark expanse of space above. Flying at high altitudes allows pilots to take advantage ...

Able to loiter above 60,000 feet, the General Dynamics RB-57F Canberra was ideal for high-altitude scientific ... magnetic pathways around the curvature of Earth and enters the atmosphere at ...