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Author Topic: Lunar temp a few decimal points in the wrong place ?  (Read 2675 times)
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« Reply #15 on: June 22, 2017, 08:03:54 AM »

Blimey!!! tumble faint


'In a time of universal deceit, telling the truth is a revolutionary act'
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Backache stuff!!

« Reply #16 on: June 22, 2017, 08:45:28 PM »

I thought we were talking about objects in a vacuum, and whether they could be hotter or colder than their surroundings. As you said earlier the vacuum itself doesn't really have a temperature, although strictly speaking the temperature of deep space is IIRC about 2.3K due to the background radiation, but of course objects within that space can be at any temperature you like just according to the balance of absorbed and emitted radiation. Very diffuse nebulae can have temperatures of millions of degrees as measured by various instruments even though they are close to a vacuum, in that case the temperature is an average measure of the speed of the ions atoms and molecules that make up the nebulae, some of those particles are travelling very fast indeed.


still a crazy old duffer!
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Method mixed with Madness

« Reply #17 on: June 22, 2017, 11:15:17 PM »

Spot on Desp, you've hit the nail on the head. Smiley

1.140kW mono south-facing at 49*
EpEver 4210A at 24v
24V 400 Ah battery. (4x200Ah FLA)
EpEver STI1000-24-230 pure sine inverter
Of course it'll work. (It hasn't caught fire yet).
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