Gravitational telescope creates space invader mirage
Tuesday, March 5, 2013 - 11:01
in Astronomy & Space
The NASA/ESA Hubble Space Telescope is one of the most powerful available to astronomers, but sometimes it too needs a helping hand. This comes in the form of Einstein's general theory of relativity, which makes galaxy clusters act as natural lenses, amplifying the light coming from very distant galaxies.