Compass Image for Abell 370
4 billion light-years (to Abell 370)
Image is 2 arcmin across (about 2.33 million light-years at distance of Abell 370)
Abell 370 is part of the Frontier Fields Program. These data are from the HST proposals 11108 (PI: E. Hu, University of Hawaii), 11507 (PI: K. Noll, GSFC), 11591 (PI: J.-P. Kneib, Laboratoire d'Astrophysique de Marseille), 13459 (PI: T. Treu, UCLA), 13790 (PI: S. Rodney, JHU), 14038 (PI: J. Lotz, STScI), and 14216 (R. Kirshner, Harvard University). For more information, see http://www.stsci.edu/hst/campaigns/frontier-fields.
ACS/WFC: F435W, F606W, and F814W; WFC3/IR: F105W, F125W, F140W, and F160W
This image is a composite of separate exposures made by the WFC3 instrument on the Hubble Space Telescope using two different cameras and filters isolating the light of specific elements or of specific broad wavelength ranges. The color arises by assigning different hues (colors), to each monochromatic image. In this case, the colors are: blue WFC3/UVIS F435W + F606W, green WFC3/UVIS F814W + WFC3/IR F015W, orange/red WFC3/IR F125W + F140W + F160W.