Which of the following is not an advantage of spacecraft flybys over ground based telescope observations?

Question

A) spacecraft can measure local magnetic fields.
B) spacecraft can backlit" views of planetary rings.
C)spacecraft can sample the gravitational field of a planet.
D) Spacecraft can make huigly detatailed images of the planet and its moon that they orbit.
E) Spacecraft can monitor changes in planet's atmosphere.

Answer 1

I'd have to go with C. We've already been able to measure the gravitational effects of the planets in great detail and considerable precision by observations of other objects int he solar system using ground-based telescopes.

Local variations in the magnetic field require close proximity -- and a telescope can't measure magnetism.

To get a backlit view of rings, we'd have to be able to go to the opposite side of the planet from the sun -- can't do that with a telescope

Huge advantage in detail for photography from close up.

Micro-changes in a planet's atmosphere is best done from close up.

Answer 2

a

Answer 3

b

Answer 4

B