When Dark Energy Turned On
These schematic images show the universe at three different times in its history. Credit: E.M. Huff, the SDSS-III team, and the South Pole Telescope team; graphic by Zosia Rostomian
Gilliland Receives Beatrice M. Tinsley Prize
Ramsey Appointed an Eberly College of Science Distinguished Senior Scholar at Penn State
Ramsey Appointed an Eberly College of Science Distinguished Senior Scholar at Penn State
New Map of the Universe Reveals Its History for the Past Six-Billion Years
Green orb-like object against dark background.
Study Reveals Milky Way Stars That Wander but Are Not Lost
This illustration shows measurement data of the metal content of stars observed by SDSS-III's SEGUE-2 survey in the disk of our Galaxy. Credit: Judy Cheng and Connie Rockosi (University of California, Santa Cruz) and the 2MASS Survey.
New Astronomy Tool Peers Through the Heart of the Milky Way
This "first-light" field of stars observed byAPOGEE keys in on a large region in the disk of our galaxy towards the constellation Cygnus. Credit: P. Frinchaboy (Texas Christian University), J. Holtzman (New Mexico State University), M. Skrutskie (University of Virginia), G. Zasowski (University of Virginia), NASA, JPL-Caltech and the WISE Team.
Evidence Is Found that Our Milky Way Galaxy is Destroying Its Dwarf-Galaxy Neighbors
An artist's impression of the four tails of the Sagittarius Dwarf Galaxy (the orange clump on the left of the image) orbiting the Milky Way. Credit: Credit: Amanda Smith, Institute of Astronomy, University of Cambridge
Peculiar Cosmic Explosion on Christmas 2010 Continues to Intrigue Astronomers
Frame from animation that interprets the Christmas burst as the merger of a red giant and a neutron star. Credit: NASA/Goddard Space Flight Center
Asteroid Video Captured by NASA's Swift Satellite
Starry sky with gray overlay.
Three New Planets and a Mystery Object Discovered Outside Our Solar System
Credit: Marty Harris/McDonald Obs./UT-Austin
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