Complex sentence: The first measurement of a gravitational microlens was supervised by Arthur Eddington during a solar eclipse-he measured the small shift in the apparent position of stars due the gravity of the sun, dramatically confirming the predictions of general relativity.
Split into simpler sentences: The first measurement of a gravitational microlens supervised by Arthur Eddington during a solar eclipse. He measured the small shift in the apparent position of stars due the gravity of the sun, dramatically confirming the predictions of general relativity.