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Forum » SpaceEngine » Science and Astronomy Discussions » Exoplanet News Thread (Post here any discoveries related to extrasolar planets)
Exoplanet News Thread
steeljaw354Date: Saturday, 27.08.2016, 18:31 | Message # 256
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I honestly can't stand how every Earth sized planet is depicted as an Earth like planet. Just like how I cannot stand how they think Earth like life will live on Earth like worlds, when that's probably not the case due to the sheer size of the universe.
 
WatsisnameDate: Saturday, 27.08.2016, 20:09 | Message # 257
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Welcome to popular science reporting. Things like Msin(i) are too complex for most readers, so planets discovered with radial velocity will often instead state their minimum mass as if it is fact. Habitable-zone planets with masses similar to Earth are often artistically rendered as Earth-like because it sells better than other possibilities. Best to show a nice transparent atmosphere too with the planet's sun(s) on the horizon because that's more evocative than an airless world or a hazy or overcast sky. Bonus points for showing alien flora.

Most reporting of exoplanet discoveries actually isn't that bad in the writing (can be exceptions there too, though), but it's the imagery that sells. I listened to a talk once by an astrophysicist at Harvard-Smithsonian, who said news outlets wouldn't take his stories because "he didn't have any pretty pictures to show". So he learned how to draw planets from scratch... nevermind that doing so automatically makes a bunch of assumptions about the planet that we can't possibly know. :)

If exoplanet news was completely scientifically accurate, there'd be no images whatsoever except a light curve and radial velocity measurement, and have fun teaching readers how to interpret them. I think it's actually good to show the renditions, but just remember that's all they are and the meat of the science lies in how the planet was detected and what is our understanding of the system.



 
JadestarDate: Sunday, 28.08.2016, 10:29 | Message # 258
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I don't know where else to post this, not necessarily a planet but interesting nonetheless. It looks like we have a new "Wow!" signal.

An Interesting SETI Candidate in Hercules
 
spacerDate: Sunday, 28.08.2016, 10:46 | Message # 259
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very cool even if the chances of aliens is small.
i hope we get more news about it



"we began as wanderers, and we are wanderers still"
-carl sagan

-space engine photographer
 
steeljaw354Date: Sunday, 28.08.2016, 15:04 | Message # 260
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Could someone make a Teegarden B based off of the information we have about the planet?
 
JackDoleDate: Sunday, 28.08.2016, 18:09 | Message # 261
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Quote steeljaw354 ()
Could someone make a Teegarden B based off of the information we have about the planet?

Here it is. dry

Code

// -*- coding: utf-8 -*-
// Title: Teegarden's Star b
// Name: Teegarden_b.sc
// Not confirmed
// 2016.08.28 17:42:08

// Put in 'addons\catalogs\planets'

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

Planet  "Teegarden's Star b/2MASS J02530084+1652532 b"
{
    ParentBody  "2MASS J02530084+1652532"
    
    Mass        83.67736
    
    Orbit
    {
        SemiMajorAxis   0.014
        Period          0.00564
    }
}

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

The planet is a Cold gas giant in SpaceEngine.



I also made a slightly modified script for the star.
Code

// -*- coding: utf-8 -*-
// Title: Teegarden's star
// Name: TeegardensStar.sc
// JackDole 2016.08.28 18:32:07

// https://en.wikipedia.org/wiki/Teegarden%27s_star
// http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NAME+Teegarden%27s+star

// Put in 'addons\catalogs\stars'

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

RemoveStar  "2MASS J02530084+1652532"

Star "Teegarden's Star/SO J025300.5+165258/2MASS J02530084+1652532/LSPM J0253+1652"
{
    RA      02 53 00.849
    Dec     16 52 53.28
    Dist    3.858
    
    Class   "M6.5 V"
    MassSol 0.08
    RadSol  0.127
    
    AppMagn 15.3
    //Lum     0.00073
    Teff    2637
    
    FeH     -0.55
}

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


If you take 'Lum 0.00073' instead of 'AppMagn 15.3', the planet will be a Hot gas giant. ('Lum' value from Wikipedia).
Attachments: 2807552.jpg(172.3 Kb) · 7996596.jpg(190.0 Kb) · Teegarden_b.sc(0.6 Kb) · TeegardensStar.sc(0.8 Kb)




Don't forget to look here.

 
midtskogenDate: Sunday, 28.08.2016, 18:59 | Message # 262
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One problem is that ESI is completely useless for what it's being used for. For instance, Kepler-438b has the highest ESI of any planet found so far, 0.88, yet it's totally flamed by radiation from its star every 100 days or so, making it totally inhabitable. We wouldn't even want to send a probe near it if we could.



NIL DIFFICILE VOLENTI
 
steeljaw354Date: Sunday, 28.08.2016, 19:19 | Message # 263
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There is just something about Teegarden's star that just draws me to it. It's my favorite star and I don't know why. Could Teegarden's star support a habitable planet along with that gas giant?

Edited by steeljaw354 - Sunday, 28.08.2016, 19:22
 
FastFourierTransformDate: Sunday, 28.08.2016, 22:10 | Message # 264
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Quote steeljaw354 ()
Could Teegarden's star support a habitable planet along with that gas giant?


Maybe, but since the unconfirmed planet its itself on the habitable zone of the star I will bet on an habitable moon of that planet (who knows if it has). Remember! habitable is not the same as inhabited.
 
steeljaw354Date: Sunday, 28.08.2016, 23:31 | Message # 265
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Well it's 345F I doubt that's a habitable temperature. I would like to see a habitable moon addon for the planet.

Edited by steeljaw354 - Monday, 29.08.2016, 00:08
 
FastFourierTransformDate: Monday, 29.08.2016, 00:34 | Message # 266
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I said it here. The article of the discovery of the exoplanet states in page 11:

Quote
A circular planetary orbit would lead to a mass of mpsini= 4.88 M Nep with a = 0.014 AU, falling inside the classical habitable zone.


The planet may have such temperatures in SE because it probably has a great concentration of greenhouse gasses but a planet with the atmosphere of Earth would be habitable in this region (that aplies for the moons of this object maybe). I don't know. Maybe SE has simulated the conditions a bit wrong, but reality is that this planet is in the habitable zone smile
 
steeljaw354Date: Monday, 29.08.2016, 00:38 | Message # 267
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Yeah SE has lots of bugs and stuff that needs to be worked out. Is Teegarden's star one of those flare stars?
 
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