Hi sp!

Will a black and silver ball orbiting sun at 1 AU come to the
same temperature? Is it reasonable to define temperature in free
space that way?

Bernhard

--
Webspace; Low end Serverhousing ab 15 e, etc.: http://www.bksys.at
Linux Admin/Programmierer: http://bksys.at/bernhard/services.html

Bernhard Kuemel wrote:

Hi sp!

Will a black and silver ball orbiting sun at 1 AU come to the
same temperature? Is it reasonable to define temperature in free
space that way?


You mean where the moon is? SOHO satellite? We've even made temperature
measurements... Try Googling.

Sam Wormley wrote:
Bernhard Kuemel wrote:

Hi sp!

Will a black and silver ball orbiting sun at 1 AU come to the
same temperature? Is it reasonable to define temperature in free
space that way?

You mean where the moon is? SOHO satellite? We've even made temperature
measurements... Try Googling.

No, independent of earch or moon. The distance is actually not
that important, 1 AU is just an example. The question also stands
for interstellar or intergalactic space. the materials could be
perfect black body and reflector, or sud and silver.

Bernhard

--
Webspace; Low end Serverhousing ab 15 e, etc.: http://www.bksys.at
Linux Admin/Programmierer: http://bksys.at/bernhard/services.html

Bernhard Kuemel wrote:

No, independent of earch or moon. The distance is actually not
that important, 1 AU is just an example. The question also stands
for interstellar or intergalactic space. the materials could be
perfect black body and reflector, or sud and silver.

Bernhard

Perhaps you want to know what the equilibrium temperatures are for
a black and silver balls in intergalactic space (away from any obvious
heat sources). They should be identical.

In Bernhard Kuemel wrote:
Hi sp!

Will a black and silver ball orbiting sun at 1 AU come to the
same temperature? Is it reasonable to define temperature in free
space that way?

According to thermodynamics, if two objects are in thermal equilibrium
with a reservior at a well-defined temperature, than the two objects are
at the same temperature (Zeroth law).

Thermodynamics does not say how long it takes to reach equilibrium.

Objects in space sufficiently close to the sun have a really hot
frontside and a really cold backside: mold grows in MIR because of this.

--
Andrew Resnick, Ph. D.
National Center for Microgravity Research
NASA Glenn Research Center