If an Astronomer on a Planet Orbiting a Nearby Star

Multiple Choice

If an astronomer on a planet orbiting a nearby star observed the Sun when Neptune was transiting in front of the Sun, how would the Sun's brightness change? Note that the radius of Neptune is 2.5 * 10⁷ m.

A) The Sun's brightness would decrease by 0.1 percent.
B) The Sun's brightness would increase by 0.1 percent.
C) The Sun's brightness would increase by 1 percent.
D) The Sun's brightness would decrease by 1 percent.
E) The Sun's brightness would not change at all.