Observatory/əbˈzɜːrvətɔːri/ Definition 1 of 2Pro Tip 1/3Nature Watching Observatories are often for watching celestial bodies, not just any nature scene. She spent nights at the observatory gazing at constellations. Pro Tip 2/3Specialized Equipment Observatories have special tools like telescopes; they're not for casual viewing. The observatory's telescope allowed detailed views of Mars. Pro Tip 3/3Study & Research Observatories are serious scientific facilities, not places for entertainment. Astronomers work at the observatory to discover new stars.