Astronomers use a Galaxy Cluster as an Extremely Powerful “Natural Telescope” to Peer Even Farther into the Universe

An international team of astronomers recently discovered a fainter, older galaxy using the most extreme case of the gravitational microlensing technique to date

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Astronomers Discover First Mulitiple-image Gravitationally-lensed Supernova

How about four supernovae for the price of one? Using the Hubble Space Telescope, Dr. Patrick Kelly of the University of California-Berkeley along with the GLASS (Grism Lens Amplified Survey from Space) and Hubble Frontier Fields teams, discovered a remote supernova lensed into four copies of itself by the powerful gravity of a foreground galaxy cluster. Dubbed SN Refsdal, […]

Mapping Dark Matter 4.5 Billion Light-years Away

The Milky Way measures 100 to 120 thousand light-years across, a distance that defies imagination. But clusters of galaxies, which comprise hundreds to thousands of galaxies swarming under a collective gravitational pull, can span tens of millions of light-years. These massive clusters are a complex interplay between colliding galaxies and dark matter. They seem impossible […]