Astronomers turn back time to solve Einstein ring mystery

Examples of Einstein ring gravitational lenses, as seen by the Hubble Space Telescope.  (Image credit: NASA/ESA/SLACS Survey Team: A. Bolton (Harvard/Smithsonian), S. Burles (MIT), L. Koopmans (Kapteyn), T.Treu (UCSB), L. Moustakas (JPL/Caltech))

Astronomers time traveled through archives of data to spot an object that made history in the 1980s and solve a long-standing cosmic mystery. 

While practicing socially distant science, a group of researchers dug through old data from Keck Observatory on Mauna Kea in Hawaii and NASA’s Chandra X-ray Observatory managed to spot a remarkable quasar, or an active galaxy emitting incredible amounts of light. 



Source link

Latest

Satellites zoom in on cities’ hottest neighborhoods to help combat the urban heat island effect

Spend time in a city in summer and you can feel the urban heat rising from the pavement and radiating from buildings. Cities are...

Here’s what we know right now about getting COVID-19 again

Not long before the end of the school year, my husband and I received an e-mail from our fifth-grader’s principal that may now be...