January 15, 2013 | 554 notes

Astronomer Uses Giant Telescope to View Mars George A. Van Biesbroeck (1880-1974), astronomer at Yerkes Observatory observing Mars when it approached close to the earth in 1926, and using the 40 inch refracting telescope, the largest of its kind in the world. Photo by: Acc. 90-105 - Science Service, Records, 1920s-1970s, Smithsonian Institution Archives Ed note: Getting ready for the world’s largest radio telescope.

Astronomer Uses Giant Telescope to View Mars

George A. Van Biesbroeck (1880-1974), astronomer at Yerkes Observatory observing Mars when it approached close to the earth in 1926, and using the 40 inch refracting telescope, the largest of its kind in the world.

Photo by: Acc. 90-105 - Science Service, Records, 1920s-1970s, Smithsonian Institution Archives

Ed note: Getting ready for the world’s largest radio telescope.