Skip to main content


Voyager Spacecraft Interplanetary Explorers
Society: ASME Main Category: Mechanical Sub Category: Air and Space Transportation Era: 1970-1979 DateCreated: 1972 Pioneer Rd Flintridge State: CA Zip: 91011 Country: USA Website: Creator: NASA

The Voyager explorers, which provided scientists and the world with the first detailed pictures of faraway planets, were designed and tested during 1972 to 1977. The two most intelligent machines ever built in the NASA space program, the explorers were launched from Cape Canaveral, Fla., in 1977. Voyager 2 was launched first on August 20, followed by Voyager 1 on September 5.

Image Credit: Courtesy ASME Image Caption: Voyager Spacecraft Interplanetary Explorers Era_date_from: 1972
Society: ASME Main Category: Mechanical Sub Category: Research and Development Era: 1910-1919 DateCreated: 1918 Pasadena State: CA Zip: Country: USA Website:,-100-inch-hooker-tele Creator: Pease, Francis G. , Hale, George Ellery
The increased light-grasp of this telescope made possible many notable advances in structural cosmology between 1924 and 1930, which have revised our ideas about the universe. One of these advances was that spiral nebulae are galactic units like our own; another was the idea of an expanding universe. George Ellery Hale began planning this project in 1906; Francis G. Pease was the chief designer and mechanical engineer. The telescope's mirror support and the use of mercury flotation to reduce the friction are among its outstanding mechanical engineering features.
Image Credit: Courtesy Flickr/Bruce Irving (CC BY 2.0) Image Caption: Mount Wilson Observatory, 100-inch Hooker Telescope Era_date_from: 1918
Subscribe to Universe

We hope you enjoyed this essay.

Please support this 70-year tradition of trusted historical writing and the volunteers that sustain it with a donation to American Heritage.


Stay informed - subscribe to our newsletter.
The subscriber's email address.