Shepherd satellites are defined as A) satellites in the coma ...

[stevenposner]

Shepherd satellites are defined as
 
  A) satellites in the coma of a comet.
  B) moons that confine a narrow ring.
  C) a type of moon that orbits another moon.
  D) moons that follow the exact orbit of another, larger, moon.
  E) moons that orbit inside the system of rings.

Question 2

Mercury's magnetic field is thought to be due to:
 
  A) dynamo action, like the Earth's magnetic field.
  B) a mechanism entirely unique to Mercury.
  C) being close to the Sun.
  D) being a fossil remnant dating back to the distant past when the core was more liquid.

[cadimas]

Answer to Question 1

B

Answer to Question 2

A

[stevenposner]

Both answers were spot on, thank you once again

[cadimas]

Great! Please up vote