The answer is: 1. Radio Telescope in Jodrell Bank, England is a British observatory established in 1945 and completed in 1957. 2. First artificial satellite is Sputnik launched in 1957 3. Very Large Array near Socorro, New Mexico was completed in 1980 4. Hubble Space Telescope is launched in 1990 5. Chandra X-ray Observatory is a space observatory launched by NASA in 1999.
