Free Astronomy Magazine May-June 2016

33 SPACE CHRONICLES M ACS J0717.5+3745. [NASA, ESA, CXC, NRAO/AUI/NSF, STScI, and R. van Wee- ren (Harvard-Smithsonian Center for Astrophysics)] bigger cluster. MACS J0717, one of the most complex and distorted galaxy clusters known, is the site of a collision between four clusters. It is located about 5.4 billion light- years away from Earth. These new images of MACS J0416 and MACS J0717 contain data from three different telescopes: NASA's Chandra X-ray Observatory (diffuse emission in blue), Hubble Space Telescope (red, green, and blue), and the National Science Founda- tion's Karl G. Jansky Very Large Ar- ray (diffuse emission in pink). Where the X-ray and radio emission over- lap the image appears purple. Astronomers also used data from the Giant Metrewave Radio Tele- scope in India in studying the pro- perties of MACS J0416. n