What is the likely source of lunar ice?
A) water that was present when the Moon formed
B) contamination from human exploration of the Moon
C) volcanism earlier in the Moon's history
D) impacts of meteoroids and comets
Question 2
Given that the planet orbiting the nearby star 51 Pegasi is about 20X larger than the Earth, but 400X more massive, on that world you would weigh:
A) the same as you do here.
B) twice as much as you do here.
C) half as much as you do here.
D) 20X more that you do here.
E) 400X more than you do here.
The discovery of aquaporins, water channels made of a transmembrane protein.
Schematic of the Earth–Moon system (without a consistent scale)
The Far Side of the Moon
Habitat reconstruction is possible based on the kinds of plants present at past sites.
Wetlands Store and Clean Water
Water CO2