Free planetarium

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JackDole
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14 Feb 2017 06:06

Here is Lalande 21185 b as a terra planet. However, he is a little hot.
scr00035.png

The image is from SE 0.971
// -*- coding: utf-8 -*-
// Name: Lalande21185.sc
// JackDole 2017.02.14 13:58:23

// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=lalande+21185&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+i
//------------------------------------------------------------------------------

Star "Lalande 21185/HD 95735/GJ 411/HIP 54035"
{
    RA      11 03 20.19400
    Dec     35 58 11.5682
    Dist    2.54686227

    Class       "M1.5 V"
    MassSol     0.48
    RadSol      0.393
    
    Teff        3828.0
}

//------------------------------------------------------------------------------

// -*- coding: utf-8 -*-
// Name: Lalande21185Sys.sc
// JackDole 2017.02.14 13:32:45

// http://exoplanet.eu/catalog/lalande_21185_b/
//------------------------------------------------------------------------------

Planet  "Lalande 21185 b/HD 95735 b/HIP 54035 b/GJ 411 b"
{
    ParentBody  "Lalande 21185"
    Class       "Terra"
    
    DiscDate    "2017"
    DiscMethod  "RadVel"
    Updated     "2017.02.14"
    
    Mass        3.81679389
    
    Orbit
    {
        Period      0.02702125
    }
}

//------------------------------------------------------------------------------

Lalande21185.pak
(1.34 KiB) Downloaded 23 times
 
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Gnargenox
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15 Feb 2017 00:16

Thanks JackDole! I would jump all over this but I'm still hesitant to add mods... I guess now is a good time... So here goes!
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Starlight Glimmer
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20 Feb 2017 11:14

Last edited by Starlight Glimmer on 20 Feb 2017 11:54, edited 1 time in total.
 
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DoctorOfSpace
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20 Feb 2017 11:46

Moon among more than 100 planets set to be added to solar system


I don't think this is likely.
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Gnargenox
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20 Feb 2017 13:53

https://www.nasa.gov/press-release/nasa ... lar-system

This coming Wednesday might be a very eventful day! NASA is holding a "Major" news conference at 1pm. Keynote speakers working with the TRAPPIST telescope in Belgium (which detected Makemake has no atmosphere) and Sara Seager (Planetary Scientist specializing in exoplanet atmospheres) will be there. Her theoretical work on detecting bio-chemical signatures has won many awards. She coined the term Gas Dwarf, rocky Super-Earths with primarily Hydrogen/Helium atmospheres.

She also has her own equation similar to the Drake Equation that is based on gases produced by life as we know it rather than Radio Signals: N = N*FQFHZFoFLFS

where:
N = the number of planets with detectable signs of life
N* = the number of stars observed
FQ = the fraction of stars that are quiet
FHZ = the fraction of stars with rocky planets in the habitable zone
Fo = the fraction of those planets that can be observed
FL = the fraction that have life
FS = the fraction on which life produces a detectable signature gas

Maybe even Gliese 411-b, recently discovered and noted in the "100+planets" release, is the 4th nearest system to our own & could be the culprit, but that is very, very wishful thinking on my part!
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Hornblower
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20 Feb 2017 14:02

Keep in mind the last time NASA held a "Major News Conference" they just had greater proof that Europa had a greater sub-surface ocean. My guess is they found another exoplanet with a Nitrogen-oxygen atmosphere.
"Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space." - Douglas Adams
 
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Watsisname
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20 Feb 2017 19:37

Do not get your hopes up before the actual conference.  Wait to see what they found, and then check the papers themselves and the critical review of their results.

Lots of "big announcements" end up being somewhat mundane or not what you expect, or are sensational but end up not withstanding further review.  Not saying that's going to happen here, but again, wait to see. :)
 
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Gnargenox
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21 Feb 2017 09:06

I have now learned that tomorrow's NASA news announcement is not about bio-chemical signatures in the atmosphere as I had hoped (darn lol) but it is is something cool - or "warm" to be precise. A nearby star has at least 7 earth-sized planets and they may be just the right temperature for liquid water to exist - if they have any water, that is.

The individuals attending this press event at NASA have been looking for planets circling other stars. Last year one of them, Michael Gillon was lead author on a paper "Temperate Earth-sized planets transiting a nearby ultracool dwarf star" in Nature detailing how his team has confirmed 3 Earth-sized terrestrial planets circulating a cool dwarf star 2MASS J23062928-0502285 (now known as TRAPPIST-1), an M8V class star which is only 39.5 light years away.

Now, it will be announced tomorrow that 4 more Earth-sized planets have been confirmed circling TRAPPIST-1. It is possible that most of the planets confirmed thus far circling TRAPPIST-1 could be in the star's habitable zone. Astronomers are clearly excited about these new planets.

I'm very skeptical about habitability claims for M Dwarfs (the XUV habitability zone tends to be pretty far from the star when the planets are forming - any planets far enough to avoid being XUV-cooked are too cold for liquid water.
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Gnargenox
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21 Feb 2017 12:05

Here ya go. A day before the official announcement lol
16835969_1486807768020846_8748768206886738876_o.jpg

http://www.businessinsider.fr/us/earth- ... -1-2017-2/
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Xoran
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22 Feb 2017 08:04

Gnargenox wrote:
Source of the post I'm very skeptical about habitability claims for M Dwarfs (the XUV habitability zone tends to be pretty far from the star when the planets are forming - any planets far enough to avoid being XUV-cooked are too cold for liquid water.

What if they got XUV-cooked, and got water after that from comets forming far out enough to not get cooked? I believe that was at least a major part how Earth got its water, and comets with organic molecules could create life on planets they hit, like in the video game Spore, which is maybe how Earth itself got life.
But still, planets in the habitable zone around MV stars would probably be tidally locked, or be in a spin-orbital resonance, which would make solar days very very long (like 100 days), which would have some of the same effects as being tidally locked, and considering it is a very small red dwarf, tidal locking or spin-orbital resonance would be almost guaranteed.
Space is too big to understand, so do not try to understand.
 
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tRetro-Visor
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22 Feb 2017 10:19

 
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Spacer
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22 Feb 2017 10:45

cant wait for james web telescope to start study the planets atmosphere! :D
one thing we cant forget about is that it's red dwarf system, the planets are probably locked so only the middle zone between the night time and the day time could host life or water (like in SE locked planets)
the planets orbit the star so close to each other its like jupiter's moons system:
Image

and that how the sky would look like, you would see the other planets and the star big in the sky:
Image
and new poster from nasa:
Image
"Exploration is in our nature. We began as wanderers, and we are wanderers still"
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Xoran
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22 Feb 2017 11:10

Spacer wrote:
Source of the post the planets orbit the star so close to each other its like jupiter's moons system:

Probably not, orbital period depends not only on semi-major axis but also on the mass of the parent. Since TRAPPIST-1 is at least 80 or so times the mass of Jupiter, a planet around this star with the same orbital period as let's say Ganymede would be much farther out from TRAPPIST-1 than Ganymede is from Jupiter.
Space is too big to understand, so do not try to understand.
 
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SpaceEngineer
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22 Feb 2017 11:25

viewtopic.php?f=10&t=190
Oops I was ninja'd :) Maybe move all exoplanet news to that thread?
 
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ettore_bilbo
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22 Feb 2017 11:35

http://video.repubblica.it/tecno-e-scie ... ref=HREA-1

Hi SpaceEngineer... did you know that here in Italy someone used Space Engine for create a video about TRAPPIST-1 planets?
repubblica.it is online version of one of our main newspapers...


edit, now i see that video comes from eso site! cool!
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