Activity for WhatRoughBeast‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Can I significantly shorten the days on a planet that can support human life? There is no need to go for a different planet size. Just change the rotation rate of the planet. Since the current models suggest that, just after the moon was formed, the length of a day was about 2 hours, a 12-hour day certainly seems reasonable. Plants and animals will need to have evolved the app... (more)	—	over 9 years ago
Answer	—	A: What stellar number density would two galaxies have to have for another star to collide with the Sun during a galactic merger? Well, this is easily answered, but first we need to get a few assumptions stated. First, let's assume that all stars are the same size as our sun, about 5 light-seconds across (I'll use ls often in the following, as a contraction for light-seconds). Second, we'll assume that our system will pass thro... (more)	—	over 9 years ago