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Author Topic: Lunar temp a few decimal points in the wrong place ?  (Read 3947 times)
todthedog
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« Reply #15 on: June 22, 2017, 08:03:54 AM »

Blimey!!! tumble faint

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Kidwelly South Wales
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Backache stuff!!


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« 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.

Desp
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still a crazy old duffer!
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« Reply #17 on: June 22, 2017, 11:15:17 PM »

Spot on Desp, you've hit the nail on the head. Smiley
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1.140kW mono south-facing at 49*
EpEver 4210A at 24v
New (Old) 8S7P LiFe battery, 105Ah @ 26.4V
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Of course it'll work. (It hasn't caught fire yet).
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