Skip to main content

ESO's Very Large Telescope with Laser Beam

ESO large telescope
(Image credit: ESO/G. Hüdepohl (<a href="http://www.atacamaphoto.com">www.atacamaphoto.com</a>))

A glowing laser shines forth from the European Southern Observatory’s Very Large Telescope, creating an artificial star 90 km above the surface of the Earth, a device used to fine-tune the telescope's optics.

Space.com Staff
Space.com is the premier source of space exploration, innovation and astronomy news, chronicling (and celebrating) humanity's ongoing expansion across the final frontier. We transport our visitors across the solar system and beyond through accessible, comprehensive coverage of the latest news and discoveries. For us, exploring space is as much about the journey as it is the destination.