Re: PHYSICS/SPACE: Gravity/Time broken?

Robin Hanson (
Thu, 30 Sep 1999 09:42:57 -0400

At 04:26 PM 9/29/1999 -0400, you wrote:
>Apparently, some believe this is caused by a planetoid's gravity:
>Don't know whether there is a consensus about this.

That doesn't make sense to me at all. The paper cited, , describes the acceleration as constant in time and directed toward the sun, for three different spacecraft (Pioneer 10,11 & Ulysses) in very different directions. Ulysses was at 1-5 Au and the Pioneers at 20-40 Au. Even if the Ulysses data is a mistake, didn't the Pioneers go off in substantially different directions? And wouldn't a planet's attraction vector vary as a craft moved from 20 to 40 Au?

Robin Hanson Asst. Prof. Economics, George Mason University MSN 1D3, Carow Hall, Fairfax VA 22030
703-993-2326 FAX: 703-993-2323