That's at tricky one, because it depends on how you define "powerful." In terms of sheer aperture it would be the Gran Telescopio Canarias (Canaries Great Telescope) on La Palma, Canary Islands. Its mirror is 10.4 meters in diameter, the current largest single mirror. read more
That's at tricky one, because it depends on how you define "powerful." In terms of sheer aperture it would be the Gran Telescopio Canarias (Canaries Great Telescope) on La Palma, Canary Islands. read more
The 5 Most Powerful Telescopes, and 5 That Will Define the Future of Astronomy 2009 is the International Year of Astronomy, celebrating the 400th anniversary of Galileo turning a looking glass to the sky and shaking up humanity's view of the heavens. Then, puny telescopes could see moons, planets and the occasional celestial body. read more