2. (6 pts) Formation of the solar system (nebula theory)

a) From what you drew for Question 1, you should be able to tell the spin direction of the

protoplanetary disk (the disk formed from the collapse and flattening of the original nebula)

during the formation of the solar system. What is the spin direction? (2 pts)

b) Where is the frost line with respect to the planets' orbits? (2 pts)

c) Why are most icy bodies (e.g. icy moons, comets, dwarf planets) found outside the frost line? (2

pts)