Mature-Looking Galaxies Existed 11.5 Billion-Years-Ago
Studying the evolution and anatomy of galaxies using the Hubble Space Telescope, an international team of astronomers led by doctoral candidate BoMee Lee and her advisor Mauro Giavalisco at the Univ. of Massachusetts Amherst have established that mature-looking galaxies existed much earlier than previously known, when the universe was only about 2.5 billion years old, or 11.5 billion years ago. “Finding them this far back in time is a significant discovery,” says lead author Lee.
The team used two cameras, Wide Field Camera 3 (WFC3), and Advanced Camera for Surveys (ACS), plus observations from the Hubble’s Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), the largest project in the scope’s history with 902 assigned orbits of observing time, to explore the shapes and colors of distant galaxies over the last 80 percent of the Universe’s history.
Read more: http://www.laboratoryequipment.com/news/2013/08/mature-looking-galaxies-existed-115-billion-years-ago