Flickering Quasars Used To Measure Universe Expansion | Video

Using gravitational lensing, astronomers have imaged distant quasars with the Hubble Space Telescope. They used the imagery to determine that the Universe is expanding quicker that previously thought. [Full Story]

credit : Space.com/ imagery courtesy: NASA/GSFC/ESA/Hubble/STSci/produced and edited by @SteveSpaleta and @CallaCofield