Author Question: Pluto's bulk density is: A) 3,400 kg/m3, comparable to our Moon's. B) 2,100 kg/m3, similar to ... (Read 68 times)

cnetterville · **on:** Jul 27, 2018

Pluto's bulk density is:

A) 3,400 kg/m3, comparable to our Moon's.
B) 2,100 kg/m3, similar to Callisto's mix of rock and ice.
C) 1,200 kg/m3, like Mimas, made of almost pure ice.
D) 700 kg/m3, like Saturn a mix of hydrogen and helium slush.
E) 400 kg/m3, like Comet Halley's nucleus, a ice ball with many gas pockets.

Question 2

Most stars in the Milky Way probably formed:

A) alone.
B) in intergalactic space, then were swept up into the Galaxy.
C) in clusters in the Galaxy's spiral arms.
D) from planetary nebulae.
E) in the galactic Nucleus, then migrated outward later.