Uresname

Until you get crushed by pressure or frozen from near zero temps

Country?

Hey what can I search to find this?

I have no experience here but could you add weight to the others to make them heavier? Maybe tape strips that will have minimal aerodynamic impact? If not, maybe sand or shave down the heavier ones until they match?

Nice name, beat me to it

It's a plot point in the Three Body Problem series :)