Q:

What are the planets in order from smallest to largest?

A:

Quick Answer

From smallest to largest, the eight planets in the Solar System are Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn and Jupiter. Pluto used to be the ninth planet in the Solar System, but it was reclassified in August 2006 as a dwarf planet.

  Know More

Full Answer

Jupiter, the largest planet in the Solar System, has a diameter of 88,730 miles and an orbital period of 11.9 Earth years. In contrast, Mercury, the smallest planet, has a diameter of 3,031 miles and an orbital period of 88 Earth days. Pluto, now known as a dwarf planet, was considered to be the smallest planet in the Solar System until its reclassification. It has a diameter of 1,430 miles and an orbital period of 248 Earth years.

In order from closest to farthest from the sun, the eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The four planets closest to the sun — Mercury, Venus, Earth and Mars — are called the terrestrial planets because each has a solid surface. The remaining four planets — Jupiter, Saturn, Uranus and Neptune — are called the Jovian planets because, like Jupiter, they are primarily composed of gases like hydrogen and helium, and lack a solid surface.

Learn more about Planets

Related Questions

  • Q:

    What is the order of the planets?

    A:

    Beginning with the planet closest to the Sun and moving outward, the order of the planets is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Before its reclassification as a dwarf planet by the International Astronomical Union in 2006, Pluto was considered the ninth and most distant planet.

    Full Answer >
    Filed Under:
  • Q:

    What are the nine planets in order?

    A:

    The nine planets in order are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and, if it's still considered the ninth planet, Pluto. However, not only has Pluto been demoted to a dwarf planet by some astronomers, but its orbit is so eccentric that there are times when it's closer to the sun than Neptune.

    Full Answer >
    Filed Under:
  • Q:

    What are the names of the nine planets in order?

    A:

    The names of the nine planets in order are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Many individuals use a mnemonic, or memory device, to remember these names. Pluto used to be considered a planet but is no longer classified as one.

    Full Answer >
    Filed Under:
  • Q:

    How many planets have moons?

    A:

    Six of the eight planets in the solar system are known to have moons. Mercury and Venus lack orbiting bodies of any significant size. Earth has one moon, Mars has two, and the gas giants have several moons each.

    Full Answer >
    Filed Under:

Explore