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Author Topic: Nearby Star Hosts 7 Earth-Size Planets  (Read 1399 times)

Dragonoake

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Nearby Star Hosts 7 Earth-Size Planets
« on: February 22, 2017, 04:37:26 pm »
Astronomers say at least three of the worlds may be habitable, and could be studied for signs of life within a decade

https://www.scientificamerican.com/article/nearby-star-hosts-7-earth-size-planets-video/?WT.mc_id=SA_DD_20170222

Dragonoake

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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #1 on: February 22, 2017, 04:41:43 pm »
Quote from: Dragonoake;203088
Astronomers say at least three of the worlds may be habitable

 
My question is whether there is enough ionizing radiation in this system to create appreciable amounts of complex pre-biotic chemistry
Otherwise, all you're going to have is warm rocks and mineral water

SunflowerP

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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #2 on: February 23, 2017, 04:13:04 am »
Quote from: Dragonoake;203089
My question is whether there is enough ionizing radiation in this system to create appreciable amounts of complex pre-biotic chemistry
Otherwise, all you're going to have is warm rocks and mineral water

 
The relevant Wikipedia article indicates that, according to an XMM-Newton study, the habitable-zone planets are subject to a good bit of ionizing radiation.

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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #3 on: February 23, 2017, 07:05:03 am »
Quote from: Dragonoake;203089
My question is whether there is enough ionizing radiation in this system to create appreciable amounts of complex pre-biotic chemistry
Otherwise, all you're going to have is warm rocks and mineral water


Warm rocks might also be all you have if the first few billion years of the star's life (when M-stars are their hottest) boiled away everything life needs on these planets.
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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #4 on: February 28, 2017, 12:53:33 am »
Quote from: SunflowerP;203114
according to an XMM-Newton study, the habitable-zone planets are subject to a good bit of ionizing radiation.


The answer.... Maybe....
If the Mars rovers have taught us anything, it's about how much our models of planetary dynamics leave to be desired
« Last Edit: February 28, 2017, 06:37:55 am by Morag »

Dragonoake

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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #5 on: February 28, 2017, 12:55:30 am »
Quote from: RandallS;203125
Warm rocks might also be all you have if the first few billion years of the star's life (when M-stars are their hottest) boiled away everything life needs on these planets.


Possibly, but there are a lot of unknown variables in that model

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Re: Nearby Star Hosts 7 Earth-Size Planets
« Reply #6 on: March 13, 2017, 09:26:22 pm »
Quote from: Dragonoake;203297
Possibly, but there are a lot of unknown variables in that model

 
More on TRAPPIST-1 and radiation.

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