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(a) What must the mass of the planet be?
(b) What is the acceleration due to gravity on this planet?
use to determine the distance to:
a. α Centauri (distance: 1.3 pc).
b. a globular cluster in the Milky Way (distance: ∼ 8 to 30 kpc).
c. an M0 Ia supergiant (distance: 5 kpc).
d. the Hyades open star cluster (distance: 46.3 pc).
e. a spiral galaxy in the Fornax cluster (distance: 17.2 Mpc).
f. the Large Magellanic cloud (distance: 48.5 kpc).
Motivate your answers.