Green Bank radio telescope. Dish antenna of the 43-metre (140-feet) radio telescope at the Green Bank observatory in West Virginia, USA. The surface of the parabolic antenna is covered with a precise reflecting surface of aluminium foil which allows observations at wavelengths of 2 centimetres and above. It is used for observing narrow spectral lines such as those emitted by ionised hydrogen and helium. It has been used for interferometric observations with other American and European telescopes to produce highly-detailed images. This telescope commenced operation in 1965, and in 1997 is operated by the National Radio Astronomy Observatory (NRAO).

Photo website with Rights Managed and Royalty Free stock photos, images, illustrations and footage available for download immediately for commercial and editorial uses. Aflo is a leading independent supplier and producer of stock pictures and visual content. Search and find high quality images and video for design, print, web-use and publishing. Buy photos from our extensive collection of model released and property released sports images. Search some of the most beautiful travel and landscape pictures from our own photographers and license from our large collection of content, modern and archive, focusing on Japan. We provide free research. Register for personal account management and for full use of our Stock Photography website and start to download images now.