telescopes ground based imaging air cherenkov telescopes iact examples observatories first type rxte chandra x ray observatory compton gamma ray observatory examples iacts high energy stereoscopic system hess magic telescope electromagnetic radiation things may observed earth originate great distances gravitational wave observatories constructed gravitational waves extremely difficult detect neutrino observatories also built primarily study sun cosmic rays consisting high energy particles observed hitting earth 's atmosphere observations
Natural science Space science Astrophysics