Home > Astronomy, Astrophysics, Dark Energy & Matter, General Astronomy > GREAT3 Challenge Seeks New Methods For Measuring Weak Gravitational Lensing

GREAT3 Challenge Seeks New Methods For Measuring Weak Gravitational Lensing


Image courtesy of NASA, ESA, S. Beckwith (STScI) and the HUDF Team

Image courtesy of NASA, ESA, S. Beckwith (STScI) and the HUDF Team

Think you can figure out a way to unlock one of the biggest secrets of the universe? The recently launched third Gravitational Lensing Accuracy Testing challenge (GREAT3) is giving researchers the opportunity to do just that.

GREAT3, which is led by Carnegie Mellon University’s Rachel Mandelbaum and UCL’s (University College London’s) Barnaby Rowe, invites researchers from many fields, including astrophysics, statistics and machine learning, to test new and existing methods for measuring weak gravitational lensing. Weak gravitational lensing is one of the most direct – but also most difficult – ways scientists have to learn about the mysterious invisible dark matter and dark energy that dominates our universe.

“In previous challenges, people have come up with entirely new methods for measuring weak gravitational lensing that we are using in practice today. We’re excited to think about what people will come up with in this challenge, and to think about what new information we’ll learn about existing methods for measuring weak lensing,” said Mandelbaum, who is an assistant professor of physics and member of the McWilliams Center for Cosmology at Carnegie Mellon.

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