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Hi celestians

This addon is based in a Thermal Planetary Habitability Classification for Exoplanets and list of Earth Similarity Index. The textures were generated with the free software Textures for planets. Earthlike cloud is imported and adapted since free license textures.

Pic (fair use) by PHL:



Earthlike V1.zip (14-02-22) Downloaded 22 times

Earthlike V2.zip (19-02-22) Downloaded 28 times

NEW UPDATE 04-03-22 (see details in last post):





Example of earth and koi-4878.01 (mesoplanets), koi-7235.01 (psychroplanet) and K2-72 e (Tidally locked earthlike planet)




License:

Earthlike textures generated with Textures for planets and adapted CC-BY-SA by DrJMOS
Earthlikeclouds by NASA Blue Marble 2002
EarthlikeTLclouds adapted by DrJMOS since Karen 1989 sim Tess.png CC-BY-SA by Tesseract3821
SSC codes adapted since extrasolar addons of Sirus Alpha by DrJMOS

Details of the second version (see first post to download addon there):

Includes a merged version of the confirmed and unconfirmed extrasolar planets by Sirius Alpha to celestia/data folder to avoid fails and bugs in my addon

Now can to find 4 class of planets

1. Mesoplanets (6 planets)
2. Psychroplanets (3 planets)
3. Eyeballs (7 tidally locked planets)
4. Oceanic planets (3 planets)

TOTAL: 19 earthlikes







Sources:

https://phl.upr.edu/projects/habitable-exoplanets-catalog
Sotin et. al. (2007) Mass–radius curve for extrasolar Earth-like planets and ocean planets Icarus Volume 191, Issue 1, Pages 337-351
https://rense.com/general49/dsndt.htm
https://www.liebertpub.com/doi/10.1089/ast.2019.2161
https://www.liebertpub.com/doi/pdfplus/10.1089/ast.2019.2161

To add new category called hycean planets rename the texture called oceanclouds.png to hyceanclouds.png in Earthlike V2, modify oceanplanets.scc and to create hyceanplanets.ssc

Planets greater than 2 Earth masses in habitable zones have a higher percentage of water than Earth, can to find a lot of oceanic planets there. Even planets between 6-8 Earth masses have a percentage of 50% water and 50% rock (Sotin et al 2004 and 2007).

Hycean planets are planets with > 10 Earth masses (planets with radius > 13500 km). Hycean planets attract helium and hydrogen onto their atmospheres and clouds (Anderson et al 2021)

Modify oceanplanets.scc



Create hyceanplanets.scc



kOI-8000.01 (ocean planet) versus K2-18b (hycean planet)




Example of mesoplanets koi-4878.01 and koi-7711.01, ocean planet koi-8000.01 and hycean planet k2-18b




1. Mesoplanets (6 planets)
2. Psychroplanets (3 planets)
3. Eyeballs (7 tidally locked planets)
4. Oceanic planets (3 planets)
5. Hycean planets (2 planets)

TOTAL: 21 planets

EARTHLIKE V3 (download link in first post) Includes the new category called hyceanplanets, new clouds texture to oceanic eyeballs (ocean tidally locked) and new list of planets:

List of worlds from highest to lowest ESI numbers:

Mesoplanets:

KOI-4878.01 ESI 0.98
KOI-5737.01 ESI 0.90
KOI-7179.01 ESI 0.89
KOI-5806.01 ESI 0.88

Psychroplanets:

Kepler-1505 c ESI 0.93
KOI-7235.01 ESI 0.89

Eyeballs:

TOI-700 d ESI 0.93
Kepler-1649 c ESI 0.92
K2-72 e ESI 0.87
GJ 1061 c ESI 0.86
Ross 128 b ESI 0.86
Luyten b ESI 0.85
Kepler-442 b ESI 0.84
KOI-2626 b ESI 0.83

Ocean planets:

Kepler-296 Ae ESI 0.85
Kepler-452 b ESI 0.83
Kepler-62 e ESI 0.83
Wolf 1061 c ESI 0.80
Kepler-1410 b ESI 0.80
Gliese 667 Cc ESI 0.80
K2-3 d ESI 0.80
Kepler-1544 b ESI 0.79
Kepler-283 c ESI 0.79
Kepler-1638 b ESI 0.76
Kepler-440 b ESI 0.75
Kepler-1653 b ESI 0.74
Kepler-705 b ESI 0.73

Hycean planets:

Gliese 433 d ESI 0.74
Gliese 832 c ESI 0.74
K2-332 b ESI 0.73
Kepler-155 c ESI 0.73
Kepler-443 b ESI 0.71
Kepler-22 b ESI 0.71
Kepler-1701 b ESI 0.71
K2-18 b ESI 0.70

Some superhabitable worlds by Dirk Schulze-Makuch (2020):

KOI-5554.01 (Mesoplanet)
KOI-7711.01 (Mesoplanet)
KOI-5819.01 (Psychroplanet)
KOI-7894.01 (ocean planet)
KOI-456.04 (ocean planet)
KOI-8000.01 (ocean planet)

Other:

Kepler-438 (eyeball)
TOI-1231 (hycean planet)

Examples of best ESI numbers in each category:




Sources:

https://phl.upr.edu/projects/habitable-exoplanets-catalog
https://phl.upr.edu/projects/earth-similarity-index-esi
https://www.liebertpub.com/doi/pdfplus/10.1089/ast.2019.2161

Mesoplanets (6) Radius 6000-8600 km
Psychroplanets (3) Radius 6000-8600 km
Eyeballs (9) Radius 6000-8600 km
Ocean planets (16) Radius 9500-12700 km
Hycean planets (8) Radius >13500 km


TOTAL: 42 planets + TOI 1231 b = 43 exoplanets

FAIR USE Washington Post:

DrJMOS wrote:Hycean planets (8) Radius >13500 km

the potental planet 9 in our system is ~5 earth masses and a radius of ~18600 km (according to the latest model introduced in the paper called A search for Planet 9 in the IRAS data)
what kind of planet am i looking at here, its not massive enough to be a proper hycean type world (even if it was, it would be a frozen world)

Added after 1 minute 11 seconds:
size comparison

Planet Nine would be a mini-Neptune, resembling a smaller version of Uranus and Neptune. A "hycean" planet is a hypothetical type of mini-Neptune with a liquid water ocean; Planet Nine would be too cold to be an example of this.

trappistplanets wrote:what kind of planet am i looking at here, its not massive enough to be a proper hycean type world (even if it was, it would be a frozen world)

Hi Trappist and SevenSpheres, hycean planets is a type of minineptune but that we can to find only in habitable zones.

In other hand I've found some confusing sources about when planets start accumulating hydrogen and helium around their atmospheres.

The astronomer Geoffrey Marcy says that planets with 2 times or more than the radius of the earth have an envelope with hydrogen and helium.

In the paper "Habitability and Biosignatures of Hycean Worlds" says "with radii as large as 2.6 Earth radii (2.3 Earth radii) for a mass of 10 Earth masses (5 Earth masses)"... Here I've found somewhat confusing but I interpret that above the 5 earth masses or 2.3 times the earth radius the planets start to accumulate hydrogen and helium in atmospheres.

Other authors comment that planets with 10 Earth masses or greater.

I guess that the planet 9 is a type of very cold minineptune with a small core of rock, big mantle of ice of water mixed with ammonia/methane and a very small atmosphere of helium and hydrogen because is 5 times of earth mass. If there is not a helium or hydrogen atmosphere i guess is only an ice planet of water mixed with ammonia and methane (frozen ocean)

DrJMOS wrote:I guess that the planet 9 is a type of very cold minineptune with a small core of rock, big mantle of ice of water mixed with ammonia/methane and a very small atmosphere of helium and hydrogen because is 5 times of earth mass. If there is not a helium or hydrogen atmosphere i guess is only an ice planet of water mixed with ammonia and methane (frozen ocean)

so planet 9 is most likely a minineptune as seven stated, but there is a chance it would be a really big ice-ball leaking out there is what your saying?

Added after 2 minutes 20 seconds:

DrJMOS wrote:In the paper "Habitability and Biosignatures of Hycean Worlds" says "with radii as large as 2.6 Earth radii (2.3 Earth radii) for a mass of 10 Earth masses (5 Earth masses)"... Here I've found somewhat confusing but I interpret that above the 5 earth masses or 2.3 times the earth radius the planets start to accumulate hydrogen and helium in atmospheres.

if we ever find planet 9 and send a probe to it, we can settle this once and for all
if planet 9 is a minineptune (most likely) than that means a planet can attract hydrogen and helium at 5 earth masses
but if it has no hydrogen/helium shell, and its just a giant icy ball, than that means 5 earth masses is too small

Hi again celestians,

During next days/weeks I will upload specular textures. Now is to Eyeball planets, the download link appear in the first post.

EXAMPLE:

Please add Proxima Centauri b, Kepler-186f, Teegarden b, TRAPPIST-1d, TRAPPIST-1e, TRAPPIST-1f and TRAPPIST-1g

Omega Centauri wrote:Please add Proxima Centauri b, Kepler-186f, Teegarden b, TRAPPIST-1d, TRAPPIST-1e, TRAPPIST-1f and TRAPPIST-1g

All of these are already available long ago:
- Kepler-186
- Proxima Centauri
- Teegarden's Star
- TRAPPIST-1

DaveBowman2001 wrote:

Omega Centauri wrote:Please add Proxima Centauri b, Kepler-186f, Teegarden b, TRAPPIST-1d, TRAPPIST-1e, TRAPPIST-1f and TRAPPIST-1g

All of these are already available long ago:
- Kepler-186
- Proxima Centauri
- Teegarden's Star
- TRAPPIST-1

Okay But how does i adapt each SSC codes of each addons since extrasolar addons of Sirius Alpha?

There shouldn't be any issue; they should all use Modify or Replace statements.

Omega Centauri wrote:Please add Proxima Centauri b, Kepler-186f, Teegarden b, TRAPPIST-1d, TRAPPIST-1e, TRAPPIST-1f and TRAPPIST-1g

Hi Omega, sorry for the long time to answer your question (2022 was a very bussy year to me), as Dave has said all of these are already available long ago by a lot of users, even you can to find my guide to add NASA textures to Proxima Centauri b and Trappist planets in my post of addons here