Astronomers have observed the most luminous galaxies ever seen in the universe -- objects so bright that descriptors such as “ultra” and “hyper-luminous” don't even come close. According to lead author Kevin Harrington from University of Massachusetts Amherst, they are calling them “outrageously luminous” because there is no scientific term to apply.
The team used the 50-meter diameter Large Millimeter Telescope (LMT) - the most sensitive instrument in the world for studying star formation located on the summit of Sierra Negra, a 15,000-foot extinct volcano in the central state of Puebla, a companion peak to Mexico's highest mountain. They estimate that the newly observed galaxies they identified are about 10 billion years old and were formed only about four billion years after the Big Bang. “Discovering them will help astronomers understand more about the early universe.Their extreme brightness arises from a phenomenon called gravitational lensing that magnifies light passing near massive objects, as predicted by Einstein's general relativity. As a result, from Earth they look about 10 times brighter than they really are
SOURCE :- The Hans India