_Augustus_

TRAPPIST-1 now has seven planets. (Possible life?)

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Well this thread is orientated around the science behind the possibility of life, and exobiology.

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Probably should rename it then :) 

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1 minute ago, TheEpicSquared said:

Probably should rename it then :) 

Have you read the full name? But I can certainly make it more specific :) 

Edited by Oliverm001x

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3 minutes ago, Oliverm001x said:

Have you read the full name?

Yes, but having the Trappist-1 thing first leads people to believe that the thread is oriented towards that discovery alone.

At any rate, I'm not going to get into an argument over a thread's name. :rolleyes:

Edited by TheEpicSquared
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3 minutes ago, TheEpicSquared said:

Yes, but having the Trappist-1 thing first leads people to believe that the thread is oriented towards that discovery alone.

At any rate, I'm not going to get into an argument over a thread's name. :rolleyes:

:D

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29 minutes ago, Oliverm001x said:

So, what do you think of the discovery, and on the potential of life on these planets?

Need more data.

Speculation is pointless.

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3 hours ago, KroShan said:

Now the launch of James Webb Space Telescope will be even more exciting. I recently watched a video showing its deployment https://youtu.be/bTxLAGchWnA . Our Ariane5 launcher should be man rated for this mission...

How would that help ?

 

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Overlapping threads have been merged.

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Just now, Frybert said:

Overlapping threads have been merged.

Oh ok :) , was a bit scared for a moment as to where it was :D

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Here's a more accurate picture.

Due to the slight orbital eccentricity, areas near the terminator of TRAPPIST-1f experience periodic sunrises and sunsets thanks to libration. Here's a sunset view. I added a fictional ice giant, its moon, and a moon for TRAPPIST-1f.

FjuIsMe.jpg

 

Edited by _Augustus_
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2 minutes ago, _Augustus_ said:

I added a fictional ice giant, its moon,

Why is the giant smaller than its moon?

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21 minutes ago, Frybert said:

Why is the giant smaller than its moon?

The huge moon in the sky is orbiting F.

The little dot next to the gas giant is the gas giant's moon.

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Given the small size of the star system, It's obvious that they all formed from a very small and dense protoplanetary disk. Meaning they should all have similar if not identical compositions. Meaning that from the start all of these planets could be nearly indistinguishable from one another. As time went by, Their distances from the star caused them to become more unique. With the ones in the habitable zone becoming much more temperate and the others being potentially capable of something similar.

Once life begins it gets real messy. Assume for example: Life started on Mars but migrated to Earth through panspermia. The TRAPPIST planets being significantly closer. Have a higher chance of sharing elements and lifeforms. This means that if life begins on one planet. It could be just a few million years before it has spread out into the entire solar system. Adapting to the climates of each planet. Meaning. That if we find so much as one planet with a bio-signature. Then chances are that they all have it.

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Yep, it's gotta be the Kerbol system. 

In all seriousness, though, this system and Proxima b are a monumental discovery. 

Now, if we find life in Europa's subsurface ocean, my life will be complete.

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17 hours ago, ProtoJeb21 said:

TRAPPIST-1d may resemble a tidally locked, pre-hell Venus. It is also the planet with the smallest CONFIRMED mass. While Draugr has 0.02 Earth masses, that value is an estimate based on pulsar timing variations.
 

  • TRAPPIST-1e could be covered in blue plant life! Any photosynthetic autotrophs on a planet orbiting such a dim star would be a deep, dark blue in color.
  • TRAPPIST-1f is the first confirmed example of a potentially habitable ocean world, with a density less than that of Mars. All other oceans worlds are either too hot or only thought to be ocean worlds.
  • TRAPPIST-1g may be an icy ocean planet, based on its density and temperature. However, its oceans will be much less deep than those of 1f.
  • TRAPPIST-1h is the smallest example of an ice planet. It may be like Hoth!
 

1d seems like the perfect planet you'd want to live, on, the gravity is lower than Earth's, and the temperature is likely tropical.

Blue plant life? That sounds super awesome!

Wait, are you serious? This planet is covered in an ocean?

That's what I was thinking too, although my thought was that it got so big because as the inner planets lost some of their water, 1g picked it up, and it gained a deep ocean.

That would be pretty cool.

 

Now when are we gonna set up shop? That's the perfect place to colonize, even if they don't have life, it's all so compact, and Terraforming could be an option.

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18 hours ago, ProtoJeb21 said:
  • TRAPPIST-1e could be covered in blue plant life! Any photosynthetic autotrophs on a planet orbiting such a dim star would be a deep, dark blue in color.
  • TRAPPIST-1f is the first confirmed example of a potentially habitable ocean world, with a density less than that of Mars. All other oceans worlds are either too hot or only thought to be ocean worlds.
  • TRAPPIST-1g may be an icy ocean planet, based on its density and temperature. However, its oceans will be much less deep than those of 1f.

Earth, Laythe, and Vall! :D 

18 hours ago, ProtoJeb21 said:
  • TRAPPIST-1h is the smallest example of an ice planet. It may be like Hoth!

So if we send a probe there we're going to find a big generator and then an alien is going to take a laser blaster and blow up our probe? :) 

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Send a probe? Really now. :rolleyes:

Edited by kurja
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20 minutes ago, kurja said:

Send a probe? Really now. :rolleyes:

With Starshot, it would only take ~200 years.

A long time, but way faster than New horizons, or Dawn.

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4 hours ago, Spaceception said:

TRAPPIST-1d has an ESI of .9!!!!

Not even the Earth has that!!!

4200602142.gif

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On 2/21/2017 at 1:11 AM, razark said:

NASA: We're going to release some information.

Media/Public: NASA IS GOING TO ANNOUNCE THEY FOUND ALIENS OR SOMETHING!!!

NASA: <Minor scientific detail that only really affects 0.001% of researchers, but does so in a fundamental way.>

Small Group of Researchers: YAY!  WOW!  This changes everything we're working on!

Media/Public: So, where's the aliens?  Why doesn't NASA ever say anything useful?

NASA: We found aliens

america: LET'S SHOOT EM UP

NASA: Shooting up aliens is not wise, for one.. they probably have technologies unthought of and far more advanced

america: LEt"S NUKE EM

nasa: ...

 

(As a southerner from the US, I can relate.) :P

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I am wondering if one or some of you can quickly outline what those parameters mean when they are describing the physical properties, as found here?  I know some of them are obvious, but most I don't really know what they mean, like a couple posts up @Shpaget is getting excited about ESI and I would like to know why!  Also the units of some of the units of the measurements, I'm not familiar with them (high school physics and math was >25 years ago…).  Thanks in advance!

 

Right ascension

Declination

Constellation

Apparent magnitudes

Parallax

Distance

Mass

Radius

Density

Effective temperature

Luminosity

Metallicity 

Age

 

 

 

Edited by justidutch

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11 minutes ago, justidutch said:

 like a couple posts up @Shpaget is getting excited about ESI and I would like to know why!

ESI is Earth Similarity Index, which is a rough measure of how similar a planet is to Earth. By definition, Earth has ESI of exactly 1.

I am just having a bit of fun.

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3 minutes ago, Shpaget said:

ESI is Earth Similarity Index, which is a rough measure of how similar a planet is to Earth. By definition, Earth has ESI of exactly 1.

I am just having a bit of fun.

Hmmm, I wonder how they calculate ESI accurately.  Do they go there and count the number of lawyers and telephone-box repairmen?

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How many of these planets are face-locked to the star? I would be very interested in how that affects habitability and I really hope TRAPPIST-1 gives us an opportunity to study that.

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