Why is our Jupiter not a hot Jupiter? What will be an ideal ...

[lilldybug07]

Why is our Jupiter not a hot Jupiter?
 
  What will be an ideal response?

Question 2

The rate of cratering
 
  A) has remained constant over the last 4.6 billion years.
  B) has recently increased with more collisions in the asteroid belt.
  C) fluctuates over time, with massive bodies occasionally coming in from the Oort Cloud.
  D) shows that large asteroid impacts are more common now than in the past.
  E) shows that most interplanetary debris was swept up soon after the formation of the solar system.

[briseldagonzales]

Answer to Question 1

In our solar system, it is likely that the nebular gas cleared out before it could have much of a migratory effect on the planet. However, in other systems, planets may have formed earlier or the nebular gas may have cleared out later. Migration may occur also as long as small planetesimals are abundant. It must have occurred somewhat in our own solar system, though not enough to make Jupiter hot. Ejection of comets into the Oort cloud would mean that Jupiter must have migrated inward a bit in our own system, due to conservation of energy.

Answer to Question 2

E