Sub-Commander T'Pol:  It 's a thermo - kinetic analysis of the moons . Each of them undergoes extreme temperature variations during their orbits .
Captain Jonathan Archer: Go on .
Sub-Commander T'Pol: At night , it can drop to five or even ten degrees below _ zero _ .
Captain Jonathan Archer: That does n't sound so bad .
Sub-Commander T'Pol: During the day , the temperature can rise to as high as 170 degrees .
Captain Jonathan Archer: We better hope that Trip landed on the night side .
Sub-Commander T'Pol: And that we find him before the sun rises .