DES

From 365 Days of Astronomy, Jan. 12, 2019: The Dark Energy Survey is the subject of this 30-minute podcast. DES started in 2013 to map dark energy over 5000 square degrees of sky. It used a massive 500-megapixel camera attached to the Blanco Telescope at Cerro Tololo Inter-American Observatory in Chile. The survey concluded on Jan. 9, 2019, with its last night of observing. At the American Astronomical Society meeting in Seattle, they conferenced with observers on the last night. Listen to the conversation at the end of this journey.

Gravitational lenses

Predicted by Einstein and discovered in 1979, gravitational lensing helps astrophysicists understand the evolving shape of the universe.

At the 2017 APS Division of Particles and Fields meeting at Fermilab, Stanford scientist Daniel Gruen reported the year-one results from the Dark Energy Survey, including the most accurate measurement ever made of the present large-scale structure of the universe. You can view a video of Gruen’s talk, which is now available online.