八大行星排列顺序英文介绍（Order of the Eight Planets in our Solar System）

Order of the Eight Planets in our Solar System

The Inner Planets:

Merc.

Mercury is the first planet in the solar system, closest to the sun and the smallest in size. It has a diameter of approximately 4,880 km and completes one orbit around the sun every 88 Earth days.

Venus

Venus is the second planet in the solar system. It is similar in size and composition to Earth, with a diameter of approximately 12,104 km. It orbits the sun in 225 Earth days and has a thick atmosphere that covers its surface.

Earth

Earth is the third planet from the sun and the only known planet to support life. It has a diameter of approximately 12,742 km and orbits the sun in 365.25 Earth days. Its atmosphere is made up of nitrogen, oxygen, and other trace gases.

Mars

Mars is the fourth planet from the sun and the last of the inner planets. It has a diameter of approximately 6,779 km and orbits the sun in 687 Earth days. Its surface features include volcanoes, canyons, and polar ice caps.

The Outer Planets:

Jupiter

Jupiter is the first of the outer planets and the largest planet in the solar system. It has a diameter of approximately 139,822 km and orbits the sun in 12 Earth years. It has many moons and a system of rings that orbit around it.

Saturn

Saturn is the second of the outer planets and is known for its extensive ring system. It has a diameter of approximately 116,460 km and orbits the sun in 29.5 Earth years. It has many moons, including Titan, which is larger than the planet Mercury.

Uranus

Uranus is the third of the outer planets and the first to be discovered by telescope. It has a diameter of approximately 50,724 km and orbits the sun in 84 Earth years. Its atmosphere is primarily made up of hydrogen and helium.

Neptune

Neptune is the last planet in the solar system and is the fourth of the gas giants. It has a diameter of approximately 49,244 km and orbits the sun in 165 Earth years. It has a large system of rings and many moons.

Conclusion:

The order of the eight planets in our solar system is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The inner planets are Mercury, Venus, Earth, and Mars, while the outer planets are Jupiter, Saturn, Uranus, and Neptune. Each planet has unique features and characteristics that make them fascinating to study.