We were a little swamped when others noted this story yesterday, but it’s worth repeating: Tall buildings make big shadows, and a Pratt Institute professor and students say that Atlantic Yards is going to cast some big shadows indeed. Gowanus Lounge will let the Brooklyn Paper’s Gersh Kuntzman, who wrote the story that is making its way around the blogosphere, deliver the news:

According to a new analysis by a Pratt Institute professor and two students, shadows from the developer’s Atlantic Yards mega-project would darken a wide swath of Brooklyn from Prospect Heights to Downtown — including a strip in Fort Greene that won the “Greenest Block in Brooklyn” contest in 2002.

At its worst — at 9 am on Dec. 21 — the shadow from the 62-story “Miss Brooklyn” building, proposed for the corner of Atlantic and Flatbush avenues, would extend all the way to Fulton and Gold streets.

Brent Porter, the Pratt professor says the shadows will be especially “severe” from September to March. “Once those buildings go up, the shadowing will be forever,” he says. The professor says that a good part of Fort Greene will be lacking light in the winter in an Atlantic Yards world.