Astronomers using NASA’s Hubble Space Telescope have discovered what they say is the most distant gravitational lens yet. This image shows the quadruple gravitational lens J1000+0221. Image credit: NASA / ESA / A. van der Wel. Light is affected by gravity, and light passing a distant galaxy will be deflected as a result. Since the first find in 1979, numerous such gravitational lenses have been discovered. In addition to providing tests of Einstein’s...
