Which planet is farthest from the Sun among the eight listed?

Which planet is farthest from the Sun among the eight listed?

• A. Mercury
• B. Earth
• C. Venus
• D. Neptune

Answer: (D)

Distances from the Sun increase with how far a planet’s orbit is; inner planets stay much closer to the Sun, while outer planets sit much farther away. Among the options, Mercury, Venus, and Earth lie relatively close to the Sun (about 0.39, 0.72, and 1 astronomical unit away, respectively). Neptune, on the other hand, sits far beyond them at roughly 30 astronomical units from the Sun. That great difference in distance makes Neptune the farthest of the planets listed.

Distances from the Sun increase with how far a planet’s orbit is; inner planets stay much closer to the Sun, while outer planets sit much farther away. Among the options, Mercury, Venus, and Earth lie relatively close to the Sun (about 0.39, 0.72, and 1 astronomical unit away, respectively). Neptune, on the other hand, sits far beyond them at roughly 30 astronomical units from the Sun. That great difference in distance makes Neptune the farthest of the planets listed.