The Sputnik 8K71PS rocket streaks across the sky over Montreal on its way to deliver Sputnik 1 into orbit. Scientists from the California Institute of Technology track Sputnik 1 from a mobile van.

Today marks an amazing anniversary. It was 50 years ago on October 4th, the first unmanned satellite was launched into outer space. Sputnik was about the size of a microwave oven, but it caused fear ...

Add Yahoo as a preferred source to see more of our stories on Google. On November 3, 1957, a Soviet space dog named Laika became the first animal to orbit Earth. Laika was a 3-year-old stray ...

One of the most important satellite launches of all time was that of Sputnik. When the Soviet satellite became the first man-made satellite to orbit Earth on October 4, 1957, space must have seemed ...