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alfa015
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Do you think Tau Ceti e is inhabited?

08 Feb 2019 17:21

Hi!


Guys do you think Tau Ceti e is inhabited?

It was recently confirmed (https://twitter.com/i/web/status/1084742558041993216) and it is considered a potentially habitable exoplanet (http://phl.upr.edu/projects/habitable-exoplanets-catalog)

I just made a video about it, just in case someone is interested: https://www.youtube.com/watch?v=Lhfu3DXoOCA&list=PL3RiFKfZj3pv1ZqpFxuZinoGtUGEOankw
 
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Stellarator
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Do you think Tau Ceti e is inhabited?

08 Feb 2019 17:51

Does this announcement warrant a whole new topic on the forum? I mean, why not post this in an already existing topic like Exoplanets news? Or Science & Astronomy news?
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JackDole
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Do you think Tau Ceti e is inhabited?

08 Feb 2019 23:13

JackDole's Universe: http://forum.spaceengine.org/viewtopic.php?f=3&t=71
JackDole's Archive: http://forum.spaceengine.org/viewtopic.php?f=3&t=419
JackDole: Mega structures ... http://old.spaceengine.org/forum/17-3252-1 (Old forum)
 
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Watsisname
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Do you think Tau Ceti e is inhabited?

09 Feb 2019 00:03

There are a lot of planets considered "potentially habitable", but these include planets that may be more similar to Mars or Venus than to Earth.  We'll be better able to conclude something about whether a planet may have life on it when we have spectroscopic measurements of their atmospheric compositions.
 
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midtskogen
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Do you think Tau Ceti e is inhabited?

09 Feb 2019 10:02

And the "habitable zone" usually disregards the stability of the star.  Many stars have violent eruptions making life on the surface very unlikely.  Tau Ceti appears to be pretty stable, though.
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Do you think Tau Ceti e is inhabited?

09 Feb 2019 20:14

midtskogen wrote:
Source of the post Tau Ceti appears to be pretty stable, though.

It is also older the our sun. Studies have placed Tau Ceti to be anywhere between 5.8 to 10 billion years old (these great discrepancies are a result of differing studies using differing methods). However, that doesn't mean that the star wasn't violent in its past - perhaps enough to sterilize any planets orbiting it. In addition, it possess a dust and debris cloud starting at around 6 AU from Tau Ceti and extending out to 16 AU. This cloud is ten times as dense of Sol's Asteroid Belt, being more analogous to our Kuiper Belt. Unless there is an as of yet undetected gas-giant deflecting errant members of this cloud, impacts will be in high supply for the inner planets of Tau Ceti - including e.

As for e's habitability, this paper on planetary habitability casts some doubt on this idea (it is discussed on pg. 3-4), summarizing that planet e and probably planet f are super-massive Cytherian-type worlds due to the amount of radiation they receive from Tau Ceti in their current orbits. Of course, we cannot rule out Venus in our own solar-system having life in its clouds or deep underground, but it is generally thought of as a remote possibility.
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Gnargenox
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Do you think Tau Ceti e is inhabited?

09 Feb 2019 20:59

I hear Tau Ceti f, a bit smaller and chilly, being on the edge of the HZ, has migrated inward and only been there 2 million years?
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Do you think Tau Ceti e is inhabited?

10 Feb 2019 00:47

Gnargenox wrote:
Source of the post has migrated inward and only been there 2 million years?

Yes, over the past billion years it has migrated from the outer regions into it's current orbit - which is still outside the HZ. Furthermore, it as of yet remains on the lower end of so-called sub-neptune exoplanets in terms of mass. Perhaps 'ice-shell' life like that astronomers think may exist in the subglacious oceans of Europa could exist under the icy surface of Tau Ceti f.

Such life seems to be as vogue nowadays in speculatory astrobiology as life on Mars was back in the 70s and 80s. I'm not saying that it's the wrong idea, I just find it a bit pathetic of the public media to latch onto this idea based on recent trends in academic thought.
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