Subject: Re: Re : Planetary temperature Date: Fri, 8 Mar 2002 15:56:48 -0800 To: "Richard S. Lindzen" From: Bob Armstrong Dr Lindzen , I deeply appreciate your reply . I still don't understand why the basic value for a sphere is= not given by a rather simple expression . I fail to see how any two objects in space , e.g. black and= white balls , can , by the fundamental definition of temperature , asymptote to anything other than the same temperature . If they could , you could perpetually generate energy by= connecting thermocouples between their centers . That's a very different thing than extracting energy from gradient between their front= and back . Surely there must be simple expressions for the case of simple spheres ? 288 - 273.15 />/ 14.85 / sound reasonable . Thanks again , Bob A -- On Fri, 08 Mar 2002 15:32:45 -0500, Richard S. Lindzen wrote: >It's not as simple as you think. =A0It depends on planetary albedo= and >composition of the atmosphere. =A0It is usually claimed to be= about 288K. > >At 03:23 PM 3/8/2002 -0800, you wrote: ... >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >=A0Richard S. Lindzen >=A0Alfred P. Sloan Professor of >Meteorology > >=A0Office: 54-1720, MIT >=A0=A0=A0=A0=A0Cambridge, MA 02139 USA >=A0=A0=A0=A0=A01 (617) 253-2432 (voice) >=A0=A0=A0=A0=A01 (617) 253-6208 (fax) >=A0Home: 301 Lake Avenue >=A0=A0=A0=A0=A0Newton, MA 02461-1211 USA >=A0=A0=A0=A0=A01 (617) 332-4342 (voice) >=A0=A0=A0=A0=A01 (617) 964-3953 (fax) >=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D -- =A0Bob Armstrong -- http://CoSy.com -- 212-285-1864 http://CoSy.com/K/CoSy.htm : Rapid Quantitative Modeling http://CoSy.com/Homes : Building Affordable Homes in NYC =A0 =A0 =A0=A0=A0=A0=A0=A02002/03/08 3:36:45 PM