The Submillimeter Array (SMA) detects galaxies in the early universe. The left frame shows the best image (rendered in visible colors) of the discovery of one of the galaxies by a conventional submillimeter camera. The center image shows the SMA picture of the region, pinpointing the source (circled). A visible-light image by the Hubble Space Telescope (right) detected nothing in the area of interest. Combined, these and other data show that the source in question is a very luminous but very distant, dusty galaxy that existed when the universe was less than about 3 billion years old.
Credit: Left, UMass /Middle, CfA /Right, HST High Resolution Image (jpg) Low Resolution Image (jpg)