Vesto Melvin Slipher

Vesto Melvin Slipher was an American astronomer who played a crucial role in the field of astronomy during the early 20th century. Initially joining the Lowell Observatory as an assistant, he later became its director after Percival Lowell's death. Slipher is renowned for his work on the redshift of galaxies and contributed to the search for the elusive 'Planet X', continuing the legacy of his predecessor.