Edwin Powell Hubble, American astronomer, in the observatory
{"Image ImageDescription": "Editorial use only  \nEdwin Powell Hubble (1899-1953), American astronomer, in the observatory. Using the powerful hooker 100 inch reflector at Mount Wilson Observatory, Powell was the first to establish that there were other galaxies beyond our own. He also discovered the 'red shift' of the light from these distant galaxies, proving that the Universe is expanding, which he expressed mathematically as the Hubble Constant. Courtesy Astronomical Society of the Pacific.", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image YCbCrPositioning": "Centered", "Image Copyright": "Science Photo Library"}