Activity for Halo CE Magnum‭

Type	On...	Excerpt	Status	Date
Question	—	How would it be possible to calculate the orbital parameters of a planet from that planet's moon? My story takes place on a moon in orbit around a Gas giant. The moon has 0 tilt relative to the sun but the gas giant it orbits does have an eccentric orbit around its parent star. (it has an orbit of about 1 year) So my question is simply, by using astronomical observation would it be possible to c... (more)	—	about 7 years ago
Question	—	Is it possible for a planetary ring to exist beyond a planet's Rochelimit? So my story takes place on a moon orbiting a gas giant about the size of Jupiter and I was wondering if it was at all possible for a planetary ring to exist beyond the planets Roche limit. I get there are some tiny bands of dust that exist beyond the roche limit of planets that could be considered "r... (more)	—	about 7 years ago