Radio telescope

The first radio telescope was housed in the inventor's backyard and used a 31 foot wide parabolic reflector to concentrate radio waves from space onto a radiometer. Reber discovered points in the sky that emitted radiation more strongly than background, and was the first to prepare a radio map of the sky.
 Grote Reber United States 1937 Radio telescope

The first radio telescope was housed in the inventor's backyard and used a 31 foot wide parabolic reflector to concentrate radio waves from space onto a radiometer. Reber discovered points in the sky that emitted radiation more strongly than background, and was the first to prepare a radio map of the sky.