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Forum » SpaceEngine » Science and Astronomy Discussions » NASA's Chandra shows Milky Way has a halo of hot gas (What do you think about it?)
NASA's Chandra shows Milky Way has a halo of hot gas
SalvoDate: Thursday, 04.10.2012, 17:51 | Message # 1
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http://www.nasa.gov/mission_pages/chandra/news/H-12-331.html
It looks strange, why we can't see it? wacko



The universe is not required to be in perfect harmony with human ambition.

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DoctorOfSpaceDate: Thursday, 04.10.2012, 18:13 | Message # 2
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I hate when I get a Halo of hot around me. wink

Quote
The estimated mass of the halo is comparable to the mass of all the stars in the galaxy.


Now thats pretty incredible.



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apenpaapDate: Thursday, 04.10.2012, 18:15 | Message # 3
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Well, it's extremely undense. Interstellar space is absolutely gigantic compared to stars; Alpha Centauri is 20000 times further away than Neptune, and Neptune's orbital radius is 80000 times bigger than the Sun's radius. Therefore, a gas enveloping the entire galaxy like that would probably need densities of only a couple hundred atoms per litre to be as massive as 10 billion suns; which is as good as nothing. Certainly much less dense than any vacuum we can make on Earth, the Sun's corona, or the Moon's atmosphere. Something with so little density would be completely transparent, yet could be ribonkulously massive because of its size.



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SalvoDate: Thursday, 04.10.2012, 19:18 | Message # 4
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Quote (apenpaap)
Certainly much less dense than any vacuum we can make on Earth, the Sun's corona, or the Moon's atmosphere.

Amazing biggrin
But when I saw:
Quote
temperatures between 100,000 and 1 million kelvins.

My expression was like this:




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(still don't know why everyone is doing this...)

Edited by Salvo - Thursday, 04.10.2012, 19:19
 
Antza2Date: Thursday, 04.10.2012, 19:44 | Message # 5
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Quote (Salvo)
PewDiePie picture

*Brofist*



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SpaceEngineerDate: Thursday, 04.10.2012, 22:27 | Message # 6
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Quote (Salvo)
But when I saw: Quotetemperatures between 100,000 and 1 million kelvins. My expression was like this:

Did you know that the Solar corona has a temperature 1-2 million kelvins, and Earth's orbit has passed through it? But despite the huge temperature, its density is extremely low, so we on Earth can't feel it's influence and even can't see it; only its most dense layers near the Sun at a full solar eclipse.

*



 
AerospacefagDate: Thursday, 04.10.2012, 22:35 | Message # 7
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By the way, the Earth ionosphere(beyond 85 km from surface) is mostly composed of ionized and irradiated layer of (very thin) plasma with temperature up to 1300 K.
 
SalvoDate: Friday, 05.10.2012, 13:54 | Message # 8
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Quote (SpaceEngineer)
its density is extremely low, so we on Earth can't feel it's influence


i know that, just joking wink



The universe is not required to be in perfect harmony with human ambition.

CPU: Intel Core i7 4770 GPU: ASUS Radeon R9 270 RAM: 8 GBs

(still don't know why everyone is doing this...)
 
DisasterpieceDate: Friday, 02.11.2012, 09:53 | Message # 9
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Quote (Salvo)
My expression was like this:

Wow, that's really weird (no offense intended).



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Forum » SpaceEngine » Science and Astronomy Discussions » NASA's Chandra shows Milky Way has a halo of hot gas (What do you think about it?)
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