On Aug. 21, 1914, a total solar eclipse temporarily darkened skies across Europe and Asia. A young German astronomer and ...

But during a total solar eclipse it’s dark and the sun is still up in the sky. English astronomer, Sir Arthur Eddington, traveled to western Africa in 1919 to test Einstein’s theory during an ...

And then the 1919 eclipse happened. During a total solar eclipse, the moon orbits directly in front of the sun, completely blocking the light from the sun's disk.

Today in the history of astronomy, the outbreak of WWI derails eclipse research.

During the eclipse, astronomers will reproduce the 1919 experiment that confirmed Einstein’s general theory of relativity.

Einstein hoped to see the real deal during the total solar eclipse over Russia on Aug. 21, 1914. Unfortunately, the start of World War I killed those plans, as Germany had declared war on Russia.

Albert Einstein was relatively unknown when he published his papers that introduced the theory of relativity in 1915. An experiment conducted during the May 1919 total solar eclipse changed that.

Einstein put out his theory at the end of 1915, and the next total solar eclipse occurred just months later, on February 3, 1916. There was no time to organize an expedition on such short notice ...

Negative photo of the 1919 solar eclipse taken from Príncipe Island. The position of the stars that were examined in the historic test of Einstein's theory of gravity are marked in this photo.