[For Seniors] Trivia Quiz & Fun Facts About Neptune

about 4.5 billion km

Because Neptune and Earth are moving through space, their distance is constantly changing; at their closest, they are about 4.5 billion km apart. At their farthest point, they are said to be about 4.7 billion km apart. Neptune is the outermost planet in the solar system and is the farthest from Earth.

Approximately 49,500 km

Neptune’s diameter is about 49,500 km. Since Earth’s diameter is 12,742 km, it is about four times larger than Earth. With its distinctive pale blue color, it is one of the larger planets in the solar system.

♆

Planetary symbols are symbols that represent the planets of the solar system. Neptune’s planetary symbol is “♆,” a Westernized trident, reflecting the trident carried by Neptune (the Roman god from whom the planet’s name is derived). The other symbols include ♀ for Venus and ♂ for Mars.

About 60

Neptune is the third-largest planet in the solar system. It is more than 17 times the mass of Earth. Its volume is about 57 times that of Earth, which means that, in simple terms, about 60 Earths could fit inside Neptune.

to exist

The “rings” known from Jupiter and Saturn are also found around Neptune. They aren’t as clearly visible as Saturn’s, but several rings have been observed. These rings were discovered in the 1970s.

approximately -200°C

Neptune’s average temperature is said to be around -200°C. Because it is far from the Sun, it receives only about one nine-hundredth of the sunlight that reaches Earth. As a result, its surface is characterized by extreme cold.

16 pieces

As of April 1, 2025, Neptune has 16 moons recognized by the International Astronomical Union. Of these, 14 have been named, and the largest moon is called Triton.