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161594.  Fri Mar 30, 2007 10:38 am Reply with quote

Mercury boasts of he most extreme temperatures in our galaxy. The noon petperature can rise to over 350 degrees Centigrade, whereas at night it can fall to minus 183 degrees - a total range of over 500 degrees.

Source: Patrick Moore, Guide to the Universe

161595.  Fri Mar 30, 2007 10:41 am Reply with quote

Another "extreme".
What's the world's biggest passenger-carrying ship??
F: Cunard's Queen Mary 2
A: Royal Caribbean's "Freedom of the Seas". Indeed, QM2 is fractionally longer and wider, with a slightly deeper draft. Yet, according to Norwegian Maritime Society, the ship's size is calculated by its displacement in gross tonnage (gt), where Freedom comes in at 154,407 gt compared with GM2's 148,528 gt.

"Freedom" has 750,000 light bulbs on board as well as 4700 works of art. 35,000 kg of ice are consumed on board every day during a cruise.

(source: The Institution of Engineeering & Technology)

161600.  Fri Mar 30, 2007 11:26 am Reply with quote

Venus is hotter than Mercury overall, isn't it? Due to the cloud cover IIRC.

161615.  Fri Mar 30, 2007 12:29 pm Reply with quote

More on planet temperature, the centre of the Earth has been measured at about 6,650 degrees Fahrenheit.

c.f the surface of the sun at 9,980 degrees.


161685.  Fri Mar 30, 2007 4:52 pm Reply with quote

See post 156642, though the relevant question isn't quite the one Vitali posed:

Q. Which is the hottest planet?
1) Mercury
2) Venus
3) Earth
4) Mars

A. 2). Venus. Even though Mercury is so much closer to the sun, it has a very thin atmosphere, mainly composed of sodium, and the thin air does not trap heat very well. Daytime temperatures on Mercury can rise to 800°F and nighttime temperatures can go down to -300°F. The weather’s pretty much always the same on Mercury.

The surface temperature on Venus can approach 900°F , largely because of the greenhouse effect. The Venusian atmosphere is mostly carbon dioxide plus a little nitrogen, and the planet is cloaked in dense sulphuric acid clouds. However, water and water vapour are very rare, because of the high temperature.

162246.  Mon Apr 02, 2007 4:32 am Reply with quote

Vitali wrote:
Mercury boasts of he most extreme temperatures in our galaxy.

In our Solar System maybe. It's a bit of a reach to claim it for the entire galaxy, especially given the rate that new planets are being discovered, some even closer to their suns than mercury is to our Sun.


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