Timeline for Feasibilty of binary planet having life
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Mar 18, 2020 at 5:05 | comment | added | Jim Baerg | I recommend this website planetplanet.net particularly the posts here planetplanet.net/the-ultimate-solar-system for anyone who want a solar system with multiple habitable planets for their story. | |
| Mar 15, 2020 at 21:57 | comment | added | Rebel110 | orbitsimulator.com/formulas/hillsphere.html is the calculator I used this time. It turns out, the smaller planet lies within the larger ones hill sphere but only by 120,000 or so kilometers, but the larger is out of the smaller ones hill sphere by about 150,000 kilometers. I suppose that I'll just abandon the binary planet idea for the time being, in favor of a rocky moon. | |
| Mar 15, 2020 at 21:26 | comment | added | Rebel110 | @M. A. Golding I hadn't considered this fact, I've found, due to the calculator, that the two planets could orbit each other at roughly 3× the distance between earth and its moon. I didnt put the hill sphere into account, as I was greatly oversimplifying the orbital calculations. Thank you for mentioning this however. | |
| Mar 15, 2020 at 20:26 | comment | added | M. A. Golding | @Rebel110 I have another question. The smaller planet has a radius similar to Earth but lower mass, and the larger planet has roughly twice the mass of Earth. The size of the Hill Sphere of Earth is about 1.5 million kilometers, though I think that a moon will have a stable orbit only within the inner third of the Hill Sphere radius. The larger planet's Hill Sphere will have to be calculated from its mass and the mass and distance of its star. It is possible that the smaller planet won't have a stable orbit at 1.25 million km. | |
| Mar 15, 2020 at 6:38 | answer | added | Rebel110 | timeline score: 1 | |
| Mar 15, 2020 at 6:33 | answer | added | L.Dutch♦ | timeline score: 1 | |
| Mar 15, 2020 at 6:09 | history | edited | L.Dutch♦ | CC BY-SA 4.0 |
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| Mar 15, 2020 at 5:38 | comment | added | Rebel110 | Kilisi, while it is possible for the larger of the two planets to sustain life, the question was moreso centered on whether or not the smaller of the two, which would have a day/night cycle equal to that of its orbital period, would be habitable. As well as what the tides compared to earth would be. | |
| Mar 15, 2020 at 5:29 | comment | added | Kilisi | This is known to be possible. The Earth and moon is a real life example. | |
| Mar 15, 2020 at 4:53 | comment | added | Rodolfo Penteado | Both planets seems plausible. Rocky density and razoable gravity aceleration. Depends of atmosphere and orbit around the star. The small one probably haven't one magnetosphere due slow rotation and will lose atmosphere quickly. | |
| Mar 15, 2020 at 4:45 | review | First posts | |||
| Mar 15, 2020 at 10:22 | |||||
| Mar 15, 2020 at 4:41 | history | asked | Rebel110 | CC BY-SA 4.0 |