EVERYDAY SCIENCE

Detailed explanation-1: -Pluto is approximately 2300 kilometers in diameter and Charon is approximately 1300 kilometers in diameter. By observing the two objects orbit each other, we can also calculate their masses using Kepler’s laws.

Detailed explanation-2: -Pluto has a diameter of about 1, 430 miles (2, 300 km) across.

Detailed explanation-3: -Pluto has mean diameter of 2, 300 km and very eccentric orbit (oval shaped) around the Sun, with a perihelion (nearest) distance of 4.4 × 109 km and an aphelion (farthest) distance of 7.3 × 109 km.

Detailed explanation-4: -Orbit and Rotation But on average, Pluto is 3.7 billion miles (5.9 billion kilometers) away from the Sun, or 39 AU. From 1979 to 1999, Pluto was near perihelion, when it is closest to the Sun.

Detailed explanation-5: -New Horizons observations of Charon confirm previous estimates of 751 miles across, about half the size of Pluto. By comparison, Earth has a diameter of 7, 918 miles, making it more than five times the size of Pluto.