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A-L-E-X
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09 Dec 2018 21:51

Jack do you have a pak for the entire Nightfall system?

This for reference

https://arxiv.org/abs/1407.4895

https://arxiv.org/pdf/1407.4895

Nightfall: Can Kalgash Exist
Smaran Deshmukh, Jayant Murthy
(Submitted on 18 Jul 2014 (v1), last revised 27 Aug 2014 (this version, v2))
We investigate the imaginary world of Kalgash, a planetary system based on the novel "Nightfall" (Asimov & Silverberg, 1991). The system consists of a planet, a moon and an astonishing six suns. The six stars cause the wider universe to be invisible to the inhabitants of the planet. The author explores the consequences of an eclipse and the resulting darkness which the Kalgash people experience for the first time. Our task is to verify if this system is feasible, from the duration of the eclipse, the "invisibility" of the universe to the complex orbital dynamics.

https://www.space.com/40234-alien-plane ... lgash.html

In Isaac Asimov's "Nightfall," the alien planet Kalgash is a planet with five suns that sees nightfall only once every 2,049 years. This simulation of that system by astrophysicist Sean Raymond finds that night would fall every two months, not millennia.

This Kalgash 2 star system simulation by astrophysicist Sean Raymond would place an alien planet in permanent daylight, but it requires a truly wild setup. The planet orbits a red dwarf star that itself orbits a central black hole. Eight evenly spaced stars orbit the black hole outside the parent red dwarf.

The Kalgash 3 concept by astrophysicist Sean Raymond would place an alien planet in an orbit like that of Earth around a sun-like star, which is part of a ring of 20 stars in all, that orbits a central black hole.

Astrophysicist Sean Raymond's Kalgash 4 concept would place a planet in permanent daylight using a system with a black hole at its center and the planet orbiting between two rings of sun-like stars.

The Kalgash 5 star system concept by astrophysicist Sean Raymond places an alien planet between an outer ring of blue giant stars and an inner ring of sun-like stars, with the entire system orbiting a giant black hole.

https://science.slashdot.org/story/14/0 ... gash-exist

In Isaac Asimov's "Nightfall," the alien planet Kalgash is a planet with five suns that sees nightfall only once every 2,049 years. This simulation of that system by astrophysicist Sean Raymond finds that night would fall every two months, not millennia.

This Kalgash 2 star system simulation by astrophysicist Sean Raymond would place an alien planet in permanent daylight, but it requires a truly wild setup. The planet orbits a red dwarf star that itself orbits a central black hole. Eight evenly spaced stars orbit the black hole outside the parent red dwarf.
Jack do you have a pak for the entire Nightfall system?

The Kalgash 3 concept by astrophysicist Sean Raymond would place an alien planet in an orbit like that of Earth around a sun-like star, which is part of a ring of 20 stars in all, that orbits a central black hole.

Astrophysicist Sean Raymond's Kalgash 4 concept would place a planet in permanent daylight using a system with a black hole at its center and the planet orbiting between two rings of sun-like stars.

https://science.slashdot.org/story/14/0 ... gash-exist

Two researchers from the Indian Institute of Astrophysics investigate the imaginary world of Kalgash, a planetary system based on the novel 'Nightfall' (Asimov & Silverberg, 1991). From the arXiv paper: "The system consists of a planet, a moon and an astonishing six suns. The six stars cause the wider universe to be invisible to the inhabitants of the planet. The author explores the consequences of an eclipse and the resulting darkness which the Kalgash people experience for the first time. Our task is to verify if this system is feasible, from the duration of the eclipse, the 'invisibility' of the universe to the complex orbital dynamics." Their conclusion? "We have explored several aspects of Asimov's novel. We have found that the suns, especially Dovim are bright enough to blot out the stars. Kalgash 2 can eclipse Dovim for a period of 9 hours. We also tested one possible star configuration and after running some simulations, we found that the system is possible for short periods of time."

Here are some other links for some real and unusual planetary systems

https://www.space.com/159-strangest-alien-planets.html

https://planetplanet.net/category/real- ... fi-worlds/
Last edited by A-L-E-X on 09 Dec 2018 22:09, edited 1 time in total.
 
A-L-E-X
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09 Dec 2018 22:07

Thought this would be an interesting idea for a system also (from Interstellar)

https://www.space.com/40846-black-hole- ... anets.html

A black hole could have 1 million planets orbiting near it that are potentially capable of supporting life as we know it, an astrophysicist suggests.
 
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10 Dec 2018 01:25

Nightfall
After the novel by Isaak Asimov and Robert Silverberg. https://en.wikipedia.org/wiki/Nightfall ... _and_novel)
Used article: https://arxiv.org/ftp/arxiv/papers/1407/1407.4895.pdf
1-scr00154.jpg
2-scr00155.jpg
3-scr00156.jpg
4-scr00157.jpg

But the system does not really work properly.

Actually, it should be completely dark now.
6-scr00158.jpg

But since the moon is illuminated by the main sun, which now stands just behind the planet and which is much brighter than the sun that is obscured by the moon, that is not the case.
Nighfall.pak
(2.98 KiB) Downloaded 63 times
(Put this in 'addons'.)
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10 Dec 2018 01:27

Thanks JD you made that quickly!
 
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10 Dec 2018 01:31

A-L-E-X wrote:
Source of the post ou made that quickly!

Not really. I have the system for some time. I have not published it yet, because it does not work properly.
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10 Dec 2018 01:48

JackDole wrote:
A-L-E-X wrote:
Source of the post ou made that quickly!

Not really. I have the system for some time. I have not published it yet, because it does not work properly.

JD check out the bottom links for the really unusual (real) systems, have you made any of those?

Also, do you have anything for the planet Krypton from the DC comics universe as the birthplace of Superman?
 
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15 Dec 2018 20:38

Some minor information in the "The Goblin" addon is wrong. The discovery year should be 2015 and the object should be classified as an Asteroid rather than DwarfPlanet. Hopefully you could fix that. :)
 
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15 Dec 2018 21:19

Discovery year 2025!  :? I corrected it.

As far as the term dwarf planet is concerned, it is referred to as a dwarf planet in various sources. I personally prefer the term dwarf planet.
If you do not like that, you can load the script in an editor and change the designation to 'Asteroid'.
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16 Dec 2018 01:15

JD do you have any pak for the planet Krypton?
 
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16 Dec 2018 01:25

A-L-E-X wrote:
Source of the post JD do you have any pak for the planet Krypton?

viewtopic.php?f=3&t=419#p19184
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16 Dec 2018 02:04

Thank you JD!  Do those also work with SE 0980?
 
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16 Dec 2018 03:33

I think so.
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A-L-E-X
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23 Dec 2018 02:04

Jack, I was exploring your Tau Ceti system (g,h,e,f) and it's excellent but one bug I found is that you cannot save any planetary locations- it comes back with "object not found."  I have had to go back to the parent star (which it does save) and revisit each planet from there.

Also looks like some of the other planets may have been confirmed- especially "c"

https://en.wikipedia.org/wiki/Tau_Ceti#Planetary_system

Also have you done any other worlds from the Asimov Universe (the 50 Spacer words including Aurora and Solaria, Comporellon, Trantor, Gaia, Terminus, etc.)?
 
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23 Dec 2018 05:02

A-L-E-X wrote:
Source of the post but one bug I found

It's actually not a bug in my script, but a naming convention issue. For example, the name of Planet 'g' is 'Tau Ceti g', but it is saved as 'Tau Cet g'. Actually rather a bug in SpaceEngine. I have given the planet a further name now.  For example 'Tau Cet g/Tau Ceti g'.

With this new .pak file you should also be able to load your already saved positions.
TauCeti_V2.pak
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24 Dec 2018 06:21

Thanks Jack!  Do the planets b,c,d no longer exist?

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