A Grin From Far, Far Away

Environmental & Science Education, STEM, Cosmology, Astrophysics, Universe, History of Science, Nature of Science

Ed Hessler

Whaddaya' know, gravity smiles from the aptly named Cheshire Cat galaxy group, in the constellation Ursa Major.

It is due to gravitational lensing, predicted by Albert Einstein's theory of General Relativity and when scientists and engineers devised the technology to observe it another confirming piece of evidence. The link lists and discusses all the tests of this powerful theory. The number might surprise you and also is a demonstration of the relentlessness of scientists to stress test theories.

Astronomy Picture of the Day (APOD) features and discusses "Gravity's Grin."