Hi! Happy Holidays!

While I'm no aerospace engineer,
but being "self-taught" in the basics,
I want to ask the "professional" ones
on this board whether this following suggested concept of mine is feasible:

Use a goldfoil-covered "umbrella-like" device on the nose
of a conical crew-module of a manned spacecraft to the moon to keep the
crew-module and propellant-tanks in the service module at a tolerable and
reasonable even temperatures.

BACKGROUND: One of the big problems
the Apollo Project engineers had to face back in the 60's was a way to keep the
Apollo CSM evenly heated and cooled
between Earth and the Moon.
[My guess was that they didn't want
different parts of the CSM to "bake and freeze" at the same time, causing structural warping and damage, and
overtaxing the environmental controls on the CSM; that's my guess...]

Their solution, as you surely know,
was the "slow roll" of the Apollo spacecraft along its longitudinal axis
to allow the CSM to be more-or-less
evenly heated and cooled.
This is great if you have a fuel-cell
electric powersource [Or radio-isotope
electric generator], but you can't use
the "slow roll" method if you plan to use solar-panels to provide your manned lunar spacecraft with electric power.

...That's why I suggest an goldfoil-
covered "umbrella-like" device on the nose of a conical crew-module to the moon....The tip of the parasol would face the sun. And the fabric & foil
of the same would be automatically
expanded or contracted depending on the
the temperature inside the crew-module.
It would work on the THERMOSTAT principle:
> Too cold, the parasol's fabric & foil
would be retracted to warm up the crew-module.
> Too hot, the parasol's fabric & foil would automatically be expanded to cool the crew-module.
[thermo feedback system]
When it comes time for LUNAR-ORBIT
RENDEZVOUS/DOCKING [with either a LEM
or a "lunar-orbiting space station"] the goldfoil-covered parasol would have been either retracted completely [and recessed inside the "nose" of the crew-module], or hours earlier would have been discharged/ejected from the crew-module to be replaced by ANOTHER goldfoil-covered parasol on the return trajectory
to the Earth.
Waddaya think?

Jacob