You've heard of Dark Matter.  The idea arose because the stars at the outer edges of distant galaxies are going "too" fast.  So fast that they should just fly off into empty space.  That was the premise for seeking "Dark Matter" -- there had to be some extra, unseen mass in those galaxies, holding the outer stars in their orbits.

No, no, said Mordehai Milgrom of Tel Aviv, in the 1980s.  We don't need Dark Matter, it's rather that the Newton/Einstein theory of gravity may not work at a galactic scale.

Milgrom's view has always been a minority view, though it stopped being a "fringe" view some years back.  Within the past year, the work of Kyu-Hyun Chae in Seoul has shifted the force of the argument in Milgrom's favor, and I celebrate!

When:  4 pm, Tuesday, July 16, 2024

Where:  St. Brendan's Episcopal Church, North Deer Isle Road

Presenter:  Mimi Gerstell, former staff scientist at Caltech