Galaxy Cluster Collisions: Biggest Train-Wrecks In The Cosmos | Video

The Chandra X-Ray Observatory, Hubble Space Telescope, NSF's Very Large Array and India’s Giant Metrewave Radio Telescope are studying MACS J0416 and MACS J0717, two sites where entire clusters of galaxies are combining, radically distorting the original galactic configurations. Called Frontier Fields, the effort aims to learn how the Universe evolves.

X-Ray the Sky: Chandra's Cosmos

credit : NASA/CXC/A. Hobart