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Forum » SpaceEngine » General Discussions » Single Stars with Life are Red Dwarves
Single Stars with Life are Red Dwarves
FaatNorddDate: Monday, 13.01.2014, 02:51 | Message # 1
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I noticed a majority of single stars with life are red dwarves. Why is that?
 
Donatelo200Date: Monday, 13.01.2014, 02:58 | Message # 2
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Likely because red dwarfs consist of about 70% of stars. I have found plenty of single G stars with life. I have even found a B star with life.

When using the map zoom out to about 20Pc and then the K stars to F stars should be the dominant selection with a few B and A stars sprinkled in. Lastly if the star browser is used i typically use 100Pc radius to eliminate the smaller stars when searching for life around G stars.





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Edited by Donatelo200 - Monday, 13.01.2014, 02:59
 
apenpaapDate: Monday, 13.01.2014, 03:03 | Message # 3
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Yeah, it's pretty much due to how common they are. If life around red dwarfs is possible in reality (tidal locking and instability in the stars could make it impossible), most life probably really does have a red dwarf sun.




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AerospacefagDate: Monday, 13.01.2014, 15:44 | Message # 4
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Most of these planets have little orbital period and usually are tidal-locked. This also means that, even though there's a life on these planets, it would be quite undeveloped, because only fraction of planet surface isn't a cold ice desrt with constant night, or a hot sand plain, with constant winds and scorching sun in at the zenith.
 
DeathStarDate: Monday, 13.01.2014, 16:13 | Message # 5
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Quote Donatelo200 ()
I have even found a B star with life.


Wow, can you give me the location if you still have it? The most luminous star with life I have ever found was in the F-spectrum(white-main-sequence). I thought that it isn't even possible for life to develop around these stars.
 
apenpaapDate: Monday, 13.01.2014, 16:50 | Message # 6
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Quote Aerospacefag ()
Most of these planets have little orbital period and usually are tidal-locked. This also means that, even though there's a life on these planets, it would be quite undeveloped, because only fraction of planet surface isn't a cold ice desrt with constant night, or a hot sand plain, with constant winds and scorching sun in at the zenith.


Could be. On the other hand the harsh circumstances would force organisms to adapt to wild extremes which might very well force rapid evolution. Also, when you consider the area of Earth covered by deep oceans, ice caps, and deserts, the habitable area of such a world could actually be about the same size as that on Earth.





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HarbingerDawnDate: Monday, 13.01.2014, 17:05 | Message # 7
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Quote DeathStar ()
I thought that it isn't even possible for life to develop around these stars.

Why not? As long as they live long enough then life has time to exist, and these stars are about as good for life as ours is.





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DeathStarDate: Monday, 13.01.2014, 17:35 | Message # 8
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Quote HarbingerDawn ()
Why not? As long as they live long enough then life has time to exist, and these stars are about as good for life as ours is.


Exactly because of that-their lifetime. Your average B-type star probably isn't going to last long, and I would expect that any kind of life that develops around these stars would develop at the very end of the star's life and would never get past unicellular marine life.
 
HarbingerDawnDate: Monday, 13.01.2014, 18:58 | Message # 9
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Oh, I thought you were referring to F-type stars there. Not sure why. My mistake.




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AerospacefagDate: Monday, 13.01.2014, 22:34 | Message # 10
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Quote apenpaap
Earth covered by deep oceans

Oceans are, in fact, a storehouse of life. But what's more important is the length of the coastline, which contains most abundant life. The main problem with tidal-locked planet is that these climatic extremes do not make differences for coastlines - they just consume most of them. Half of the planet is dead and covered in night, and nothing can live there. About half of the rest of the territory is a warm windy desert that hosts only those forms that can cling to the surface and lowlands.

Parts of the planet that can have an Earth-like climate, are located in the ring around the territory, so we'll have about 1/6 of the surface of the Earth and a pretty dim sun to support life. AFAIK, studies tell that this region could have pretty dynamic atmosphere and a lot of life, but I'm not sure that it can do much for the development of life itself (producing enough oxygen and nitrogen). Life simulation is SE is still very basic and doesn't take into account any prehistory.

Here it is, best tidal-locked planet I could find so far.

 
Donatelo200Date: Tuesday, 14.01.2014, 00:09 | Message # 11
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Here a two B-star planets with life. smile

Code
Place    "Ocean with life around B star"
{
  Body    "RS 0-4-1391-1237-25421-4-2793-495 6.5"
  Parent    "RS 0-4-1391-1237-25421-4-2793-495 6"
  Pos  (6.256917873897171e-010, -3.531421128829052e-010, -6.159044046798699e-010)
  Rot  (0.2200823148253425, 0.9077648773949728, 0.03715862494494708, 0.3551702952970728)
  Date    "2014.01.13 21:59:51.34"
  Vel  8.2744483e-010
  Mode    1
}


Code
Place    "Subglacial life around B star"
{
  Body    "RS 0-4-1391-1237-21936-4-308-322 7"
  Parent    "RS 0-4-1391-1237-21936-4-308-322"
  Pos  (3.063568376846654e-011, 8.971635402903883e-011, 8.000684771809763e-011)
  Rot  (0.0951815653876015, -0.1772513328427894, -0.3822387844789958, -0.9018957513237549)
  Date    "2014.01.13 02:34:58.77"
  Vel  1.2405107e-011
  Mode    1
}





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DeathStarDate: Tuesday, 14.01.2014, 00:36 | Message # 12
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Donatelo200, thanks!

Edited by DeathStar - Tuesday, 14.01.2014, 00:36
 
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