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.

Question

Quizplus · Accepted Answer

When Neptune transits in front of the Sun, it blocks a small fraction of the Sun's light, causing a slight decrease in brightness. Given Neptune's size relative to the Sun, the decrease would be around 0.1 percent.

If an Astronomer on a Planet Orbiting a Nearby Star