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	15 BIGGEST Observatories on Earth (Top Fives) View
	15 BIGGEST Observatories on Earth (SPACEEFIED) View
	The Worlds Biggest Telescopes Through History - From Galileo to Gran Telescopio Canarias (Scott Manley) View
	Top 10 Biggest Telescopes in The World \| Largest Optical Reflecting (TenTopToday) View
	Building the most advanced observatory in the world (ABC Science) View
	Gazing into Infinity: Top 10 Largest Telescopes in the World #astronomy #space #cosmos #science (FactFusion) View
	World's Biggest Optical Telescope - ELT (Launch Pad Astronomy) View
	The World's Largest Telescopes (Sideprojects) View
	One of the LARGEST Amateur Visual Telescopes on Earth!!!! 70-inch Aperture! (Maximum Astronomy) View
	Top 10 Best Observatories In The World (All Top 10) View