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NASA announces discovery of Earth-like planet with earth similarity index 0.98

nasa.gov

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Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#71

Post by drzaiusapelord »

EA wrote: post #21
qntty wrote: post #13

Here are some other planets we've found with comparable similarity. Note that earth-like similarity does not imply that it is habitable. http://phl.upr.edu/projects/habitable-exoplanets-catalog/dat...

A few zones some think need to overlap and be dialed-in to come close to offering a habitable place: water habitable zone ultraviolet habitable zone photosynthetic habitable zone ozone habitable zone planetary rotation rate habitable zone planetary obliquity habitable zone tidal habitable zone astrosphere habitable zone

Pretty sure these all apply for Mars and Venus and they're dead planets. Not sure why everyone is assuming some exo-planet must have life when the two other examples we have don't.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#72

Post by myth_buster »

dr_zoidberg wrote: post #2

As of now, the content linked says nothing more than the PR announcement from yesterday -- so either the title is misleading, or the OP comes from the future. (I'm aware he might have other sources for the title, but it's still misleading)

Edit:

I think OP is referring to the Kepler Candidate KOI-4878.01 [0] with the ESI as 0.98.

[0]: http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOver...

_______________________________________________________________

This post is ridiculously clickbaity! There should be a {{citation needed}} tag there or the title be changed.

Anyways, the anticipation for the 9AM PDT announcement is feverish.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#74

Post by pavlov »

Benjamin_Dobell wrote: post #70

Apparently there's already a Kepler discovered planet with an ESI of 0.98: http://phl.upr.edu/projects/habitable-exoplanets-catalog/dat... EDIT: Unless that list was literally just updated with ESI 0.98 planet this thread is referring to...

1,075 light years away... Assuming we could somehow accelerate a "New New Horizons" probe to near light speed, that's a disappointingly long time to wait for a flyby.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#75

Post by jameshart »

underyx wrote: post #44
colinramsay wrote: post #8

Earlier quoted context omitted.

"The Earth Similarity Index, ESI or "easy scale" is a measure of how physically similar a planetary-mass object is to Earth. It is a scale from zero to one, with Earth having a value of one." Mars is at 0.697, for reference. https://en.wikipedia.org/wiki/Earth_Similarity_Index

Well, what has a value of zero?

To have an ESI, an object needs to have a mean radius, a density, an escape velocity, and a surface temperature. Gas giants and stars, therefore, don't really have a definable ESI, since they lack a 'surface' where you can take a temperature.

If something has all of those properties, then because of the way it's defined, it has an ESI which is strictly > 0 and Incidentally, the formulation of the ESI is a good generic formula for creating 'similarity' measurements for, for example, matchmaking algorithms or similarity searches.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#76

Post by darkstar999 »

myth_buster wrote: post #72
dr_zoidberg wrote: post #2

As of now, the content linked says nothing more than the PR announcement from yesterday -- so either the title is misleading, or the OP comes from the future. (I'm aware he might have other sources for the title, but it's still misleading)

Edit: I think OP is referring to the Kepler Candidate KOI-4878.01 [0] with the ESI as 0.98. [0]: http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOver... _______________________________________________________________ This post is ridiculously clickbaity! There should be a {{citation needed}} tag there or the title be changed. Anyways, the anticipation for the 9AM PDT announcement is feverish.

We have a "flag" link. I believe it is appropriate for this post.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#77

Post by jfoster »

afarrell wrote: post #40

If there is life on that planet, I wonder if it would be similar enough to host infectious diseases. I know the Apollo team was quarantined when they got back from the moon. As someone living on a continent that has undergone one apocalypse, I hope we have a similar procedure to prevent the spread of spacepox.

Seems unlikely that anything would be physically going there and back any time soon. We haven't even been able to get some soil from Mars back to Earth yet.

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#79

Post by wuliwong »

david-given wrote: post #69
pyrophane wrote: post #57

Earlier quoted context omitted.

Hey, you guys remember swatch beats?

Am I the only one who that that beats was actually a pretty decent, if totally doomed, idea? cricket noises

I haven't had my morning coffee and I misread 'reply' as the username and thought you were having a big, multi-threaded conversation with yourself. :) I even vaguely thought 'is that guy's name reply?'

Re: NASA announces discovery of Earth-like planet with earth similarity index 0.98

#80

Post by 3327 »

dr_zoidberg wrote: post #2

As of now, the content linked says nothing more than the PR announcement from yesterday -- so either the title is misleading, or the OP comes from the future. (I'm aware he might have other sources for the title, but it's still misleading)

OP has other source, this is been making the chatter rounds in SV last night. I overheard from a JPL source.
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