# \#european-southern-observatory

**URL:** https://scanalyst.fourmilab.ch/tag/european-southern-observatory/4851.md

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## [Extremely Large Telescope—End of the Line for Earth-Based Optical Astronomy?](https://scanalyst.fourmilab.ch/t/extremely-large-telescope-end-of-the-line-for-earth-based-optical-astronomy/3822)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 0\
**Last updated:** [4 October 2023 13:18 UTC](https://scanalyst.fourmilab.ch/t/extremely-large-telescope-end-of-the-line-for-earth-based-optical-astronomy/3822 "2023-10-04T13:18:36Z")

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Here is more on the Extremely Large Telescope (ELT), currently under construction on Cerro Amazones in the Atacama Desert of Chile. With an aperture of 39.3 metres, the ELT will be the largest optical tele…