[TML] Astronaut prepares to risk life for spacewalk

[Richard Aiken]

On Nov 4, 2007 11:43 PM, Timothy Little <tim at little-possums.net> wrote:
> Also, things in shade will cool by radiating heat until the amount
> they radiate is balanced by the amount they receive from other nearby
> radiating objects.  Having an umbrella at 200 C shading something that
> therefore cools to -[50] C isn't a much better sitation.  :-)

An umbrella made of smoked glass?  Maybe double-walled, with a coolant
in between?  You only cool it enough that the radiated heat keeps the
covered item at a reasonable working temp.  Essentially a medieval
mantlet sheild, except the beseiged castle is the Sun . . . :-)

-- 
Richard Aiken

"Never insult anyone by accident."  Robert A. Heinlein