Vesto Slipher Summary

Vesto Melvin Slipher 1875-1969 American astronomer who contributed to spiral nebulae theory. Earning a doctorate from Indiana University, Slipher measured planets' rotation periods at the Lowel... Read more

When Vesto Slipher was born, it was commonly accepted that the universe was composed of a single galaxy. Everything that was visible, whether a star or a mysterious, wispy nebula, was a part of the Mi... Read more