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Gran Telescopio Canarias

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The Gran Telescopio Canarias (GTC) is one of the largest optical-infrared telescopes in the world, located at the Roque de los Muchachos Observatory on La Palma in the Canary Islands. It is designed to observe a wide range of astronomical phenomena, from nearby stars to distant galaxies.

5 Must Know Facts For Your Next Test

  1. The GTC has a primary mirror with a diameter of 10.4 meters, making it one of the largest single-aperture telescopes in the world.
  2. It uses adaptive optics technology to correct for distortions caused by Earth's atmosphere, resulting in clearer and more detailed images.
  3. The telescope became fully operational in 2009 and has since been instrumental in numerous astronomical discoveries.
  4. GTC's location on La Palma was chosen for its excellent observing conditions, including minimal light pollution and stable atmospheric conditions.
  5. It is operated by a consortium led by Spain's Instituto de Astrofísica de Canarias (IAC), along with institutions from Mexico and the University of Florida.

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