Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address. Following continuous spam/hack attempts on the forum, "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: 1 [2]   Go Down
Author Topic: Lunar temp a few decimal points in the wrong place ?  (Read 3947 times)
Global Moderator
Hero Member
Offline Offline

Posts: 4558

« Reply #15 on: June 22, 2017, 08:03:54 AM »

Blimey!!! tumble faint


Kidwelly South Wales
Hero Member
Offline Offline

Posts: 3573

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!
Hero Member
Offline Offline

Posts: 1901

Sunny North-East Hampshire

« 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
New (Old) 8S7P LiFe battery, 105Ah @ 26.4V
EpEver STI1000-24-230 pure sine inverter
Of course it'll work. (It hasn't caught fire yet).
Nissan micra Spirita   (Short range)
Pages: 1 [2]   Go Up
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!