Activity for Axion‭

Type	On...	Excerpt	Status	Date
Question	—	Could co-orbital planets also be double planets? Double or binary planets are a really cool science fiction idea. A second Earth hanging ominously in the sky. Co-orbital or trojan planets are also interesting in that you have them on more or less the same orbital plane, changing the dynamic of space travel. What if you could have both scenarios at ... (more)	—	over 4 years ago
Question	—	Is it possible to have a greenhouse effect this strong and still have an atmosphere breathable by humans? An Earth mass terran planet is orbiting a sun-like star at 2AU. I understand the limit for CO2 greenhouse effects is 1.67AU for whatever reason (giving a conventional habitable zone limit), but perhaps other gases like methane or even hydrogen could continue from that point. At 1AU, using the formul... (more)	—	almost 5 years ago
Question	—	Would tidal acceleration mean doom for this system? So we have a Super Earth of ten Earth masses, just on the threshold, and it has three Mars sized moons (so a mass ratio of 100/3, more than Saturn Vs 3 Earths). They go 40,000km, 100,000km, 250,000km in their initial semi-major axis. Our moon is receding from the Earth by 3cm or so every year. If ... (more)	—	almost 5 years ago
Question	—	The major effects on the habitability of exomoons orbiting this Brown Dwarf I'll need to give some background to this question. I'm interested in the idea of a densely inhabited star system, and having large exomoons is one way that they can all orbit roughly at the same part of the habitable zone and have very high chances for lithopanspermia while not having to orbit very ... (more)	—	almost 5 years ago
Question	—	Is it possible to make a stable planetary system like this, and what would the orbits have to be? I have a K-type star (0.5 stellar masses) as the central body, and the planets are as follows (those I want to be in the habitable zone in bold): I: An uninhabitable rocky inner planet 50% the mass of Mercury. Way too hot for life but not enough for automated equipment and bases. Tidally locked. II... (more)	—	about 5 years ago