Neptune Trivia III

NEPTUNE TRIVIA III

21) What is the smallest known moon of Neptune?

Hippocamp, named for the sea monster from Greek mythology, is only about 21 miles in diameter. By comparison, Neptune is 30,598 miles in diameter.

22) What is the diameter of Neptune?

49,244 MILES 21,651 MILES 54,109 MILES 30,598 MILES

The average diameter across the planet is 30,598 miles (49,244 km), almost four times the diameter of Earth.

23) What is the circumference of Neptune?

96,129 MILES 57,114 MILES 119,034 MILES 83,271 MILES

A trip around Neptune's equator would cover 96,129 miles (154,705 km).

24) What is the density of Neptune?

5.551 G/CM³ 0.971 G/CM³ 0.687 G/CM³ 1.638 G/CM³

The density of Neptune is 1.638 grams per cubic centimeter. The low density indicates that, like Uranus, its atmosphere is made up of more ice than Saturn and Jupiter, causing scientists to call it an "icy giant".