What technique allowed scientists to determine accurately, for the first time, the relative sizes of Pluto and Charon?
A) imaging by the Voyager spacecraft in 1989
B) direct photography using adaptive-optics telescopes on Earth in 1995
C) occultation of this planet by Earth's Moon during the 1980s
D) eclipses of the planet's surface by its moon, Charon, during 1985-1990, viewed from Earth

Question

Quizplus · Accepted Answer

The technique that allowed scientists to accurately determine the relative sizes of Pluto and Charon for the first time involved observing eclipses of Pluto's surface by its moon, Charon, during 1985-1990 from Earth. This method provided direct measurements of the sizes and shapes of both bodies.

What Technique Allowed Scientists to Determine Accurately, for the First