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 Milky Way. This opinion had not altered in the...

1875-1969 American astronomer who contributed to spiral nebulae theory. Earning a doctorate from Indiana University, Slipher measured planets' rotation periods at the Lowell Observatory. Slipher's most important research concerned the...

Vesto Melvin Slipher (November 11, 1875 – November 8, 1969) was an American astronomer. His brother Earl C. Slipher was also an astronomer. Slipher was born in Mulberry, Indiana, and completed his education at Indiana University. He spent his...

MATSAPHA, SWAZILAND -- Setting out to design a new fuel efficient wood-burning stove for developing countries, Crispin Pemberton-Pigott started by imagining a "virtual forest." He knew that conservationists often speak of "virtual power plants" when they promote various measures to conserve electricity....