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Sanar System 2021 December Contest


Xio

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  • 2 weeks later...
  • 2 weeks later...

Planet Name: Artemis 

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(Drawn by yours truly. I know, it's a masterpiece. No need to shower me in your praise. I didn't draw the rings because I could not figure out how to make a straight line)

Discovery:

Discovered in 1614 by Leonardo Dara, a Rhavanese Salvian astronomer on a research mission in an observatory located in the Đuôi Rồng Báo (ຫາງເສືອດາວມັງກອນ) mountains, northern Rhava, commonly known as the Dragon Leopard's tail. Using a telescope he was able to spot a green dot in the sky, which was too big to be a moon and too small to be a star. Mistaking it as a heavily forested planet, he named it after the Greek goddess of the hunt, Artemis because he believed the forests would be filled with animals for hunting. 

 

In 1643 a yellow object was spotted orbiting the planet, and was named Apollo. 

 

In 1923 it was discovered not to be forested, but actually had a green gaseous atmosphere. Since then it’s second largest moon, Actaeon, was discovered as well as 43 other moons.

 

Information:

The planet Artemis is the sixth planet from the San, and is approximately 9.3 AU from the San. It has 45 moons, Apollo which is the biggest and is colored an emerald green, with swirling storms and hurricanes enveloping the surface.

 

 Artemis has a surface area of 16.13 billion square miles. It has a diameter of 71,654 miles. The planet takes 27 years for it to orbit the San. 

 

Artemis has one set of rings, with 5 layers colored a shade of yellow, which is thought to be from one of Artemis’s moons crashing into the planet, the debris orbiting the planet creating the rings. Large amounts of chlorine give the planet it’s green tint and its thick atmosphere keeps the planet at a very hot temperature. Storms and hurricanes are common across the surface, while there is a very thin layer of rock forming the crust. 

 

Satellites: 

Artemis has 45 moons, the largest of which are Apollo and Actaeon. 

 

Apollo is Artemis's largest natural satellite, and is slightly larger than the Mun. It’s surface is covered with hundreds of volcanoes as well as many mountains. The yellow tint of Apollo is from large amounts of sulfur.

 

Actaeon is Artemis’s second largest moon, and is the same size as the Mun. Actaeon is named after the man in Greek mythology Artemis turned into a stag and hunted. Thought to be colored by the blood of the stag, it is actually from large amounts of iron on the surface that has oxidized. Actaeon does not have much geological action and is relatively flat, part from mount Lyssa which is roughly the size of Mount Saint Helens irl.

Edited by Rhava (see edit history)
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Posted (edited)

The deadline has been met and the competition is now over!. The staff will begin the process of judging and ranking submissions to find our top four to receive their prize. That does not mean more ideas are not welcome - they will just not be counted towards the rankings and will not be given prizes. So if you have any ideas you still wish to publish and possibly squeezing in through the gaps to join the Sanaar System then by all means still submit, however submissions posted in December will be taking priority over their specific star system niches.

We are still missing:
- Detailed asteroid belt(s)
- More dwarf planets (beyond the planets and within asteroid belts)
- More moons of gas giants (collaborating with pre-existing gas giant submissions is not required if the moon(s) submission is malleable enough to work with differing gas giants)

 

Edited by Xio (see edit history)
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  • 3 weeks later...

Good evening everyone. Two points we'd like to make.

1. As mentioned above by @Xio, we are still in the parked for some missing elements.

2. Now that biggest cartography project is over, the plan is to start making the final list once exam season is over. (A draft of one exists - no peeking, though!) Expect the results around mid-February — assuming things go smoothly

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On 12/29/2021 at 11:23 PM, Fravina said:

SUBMISSION FOR THE DOUBLE PLANETS OF PETRUS & ANDREUS

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(Graphic showing the proposed orbits of Petrus and Andreus, and their moon, Paulus. Graphic is not proportional.)

 

NAMING

The work-in-progress names of these planets were decided to be Petrus and Andreus, named after two of the Twelve Apostles in Christianity: Saint Peter and Saint Andrew. The even more WIP name of their singular moon is Paulus, named after Saint Paul the Apostle (who was not one of the Twelve Apostles). The overall name of the Petrus-Andreus system would be the Apostolic System.

Petrus and Andreus were named such because they are very closely related planets, so they were named after the brothers St. Peter and St. Andrew. Paulus has very little reason to be named after St. Paul besides the fact that I wanted another name from Christianity for the moon. Another considered name for this moon was Ionah or Ionas, after Jonah, the father of the Peter and Andrew, but this name was tossed out because it might have been confused with the prophet Jonah. The name Apostolic System was chosen because of St. Peter and St. Andrew's status as Apostles of Christ.

I believe that Paulus should probably have its name changed if it is chosen for the Sanar System. What the name could be changed to is up to debate because I was unable to find a better name that I was satisfied with. If the names Petrus and Andreus were kept, I think their moon should also be named after a significant figure in the Christian Bible.

 

PROPERTIES

The most important and noteworthy property of these double planets is that they are double planets. This means that Petrus and Andreus orbit each other around their barycenter and are roughly similarly sized (as shown in the graphic above). Petrus would have a radius of about 2700 km, and Andreus would have a radius of roughly 2450km. Regarding the planets' moon, Paulus orbits around both of them in an elliptical shape. Paulus's orbit isn’t the most stable in the universe, but it can manage. Paulus is much smaller than either planet, and it would have a radius of about 15km. 

The planets should take about 7.5 Eurth days to orbit around the barycenter, and they would also be tidally locked to one another. Both planets would be bluish in color, caused by their copper-rich soil and oxygen-rich atmospheres. Of the two, Andreus would have a thicker atmosphere and would be rich in resources, while Petrus would have a thin atmosphere and be less resource rich. Neither planet would have a source of water in any state, but Paulus would be entirely covered in ice.

If the Apostolic System illustrated above is deemed too improbable, a system closer to the Pluto-Charon system (as shown in the graphic below) could be adopted. However this would mean the considerable downsizing of Andreus, either in size or density, to account for the change in barycenter. In this setup, Paulus could probably remain, but it could also be scrapped.

 

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(Graphic showing the Pluto-Charon system and their orbits.)

 

Short Note on Location

This won’t get its own section because it is relatively short. If the Apostolic System is picked up, I believe it should be the inner planets farthest from the San, but the decision is up to the community since I have no strong opinions on any location.

Honestly, it would work out only if the Paulus is of neglectable size or of neglectable mass, because the system would scatterfor sure if there were more than two bodies thanks to the fact, that naturally-occuring Three-body systems of relatively non-neglectable mass are chaotic, especially when they are a subset of a larger system. I am more than sure that such a three-body system would've split by now. It is even considered to be a case with a hypothetical Planet Five in the early Solar System.

I like this idea, but I feel it is rather unrealistic under those conditions. As you suggested, I would suggest scraping Paulus...

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3 hours ago, Walneria said:

Honestly, it would work out only if the Paulus is of neglectable size or of neglectable mass, because the system would scatterfor sure if there were more than two bodies thanks to the fact, that naturally-occuring Three-body systems of relatively non-neglectable mass are chaotic, especially when they are a subset of a larger system. I am more than sure that such a three-body system would've split by now. It is even considered to be a case with a hypothetical Planet Five in the early Solar System.

I like this idea, but I feel it is rather unrealistic under those conditions. As you suggested, I would suggest scraping Paulus...

Actually my good sir, at far enough distances two body orbits can act as a pseudo one body with a point mass at the barycentre equal to the two masses of the co-orbiting objects creating a 2-body-esque system. It's how you can have planets orbiting binary stars in a p-type orbit. One especially interesting nugget of information about p-type orbiting planets around binary stars similar in size to the sun is that the habitability zone is coincidentally on the boundary of stability.
 

Quote

The minimum stable star-to-circumbinary-planet separation is about 2–4 times the binary star separation, or orbital period about 3–8 times the binary period.

-Wikipedia

Paulus' orbital period may need to be changed but a distance of 2-4x the separation of Petrus and Andreus should still be entirely possibly if the two planets are close to one another, the hill sphere for the point mass should be sufficient in size for Paulus' orbit considering its the furthest out of the inner San terrestrial planets. All in all, this type of configuration is entirely possible it would just need some tweaking.

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  • 3 weeks later...

Thank you very much to everyone who participated in this. It was really great to see so much creativity emerge. Who knew there are so many amateur astronomers among us? The contest rules and criteria were clearly defined. Still, the scoring was a nice challenge as well. In the end, we have a new Solar/Sanar system, with plenty of future lore to discover...

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