Activity for cometaryorbitâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Would mountains made of diamond erode? So diamonds are the hardest natural substance, but can be broken/shattered by impacts. If a planet had a large mountain range made of diamond (maybe the size of the Rocky Mountains on Earth), would it erode at all? (This is the same system in How close to a supernova can a planet retain an atmosphe... (more) |
— | over 7 years ago |
| Question | — |
Constantly sunlit/shadowed regions and weather There are craters that are permanently dark at the Moon's poles, since the Moon's axis tilt is so small that the sun never rises above the crater rim. On the Moon these get incredibly cold, since there is no atmosphere to transfer heat. What would the atmospheric/weather effects be if this situatio... (more) |
— | almost 8 years ago |
| Question | — |
How close to a supernova can a planet retain an atmosphere? I already read Can a planet survive a supernova? but that just addresses some kind of planet-remnant remaining in orbit. Parameters: Binary system. One component is a Sun-like G-type star with several rocky planets, one in the habitable zone. The other is a neutron star, the remnant of a (type II... (more) |
— | about 8 years ago |