Archive: 01/29/2010

The Dynamics of Forest Canopy Motion

(PhysOrg.com) -- While it’s well known that wind causes trees to sway, it’s less widely recognized that the movement of the trees in turn affects the wind. Mark Rudnicki, an assistant professor in the ...

Jan 29, 2010 5 / 5 (16) 0

The Cosmic Distance Scale

(PhysOrg.com) -- In 1908, Harvard astronomer Henrietta Swan Leavitt discovered that a class of stars called Cepheids have brightnesses that vary regularly with periods that are directly related to their intrinsic ...

Jan 29, 2010 4.6 / 5 (19) 0 | with audio podcast

Prometheus: Over Easy

(PhysOrg.com) -- Looking for all intents and purposes like a celestial egg after a session in Saturn's skillet, Prometheus displayed its pockmarked, irregular surface for NASA's Cassini spacecraft on Jan. ...

Jan 29, 2010 4 / 5 (3) 0