The Nine Planets is an encyclopedic overview with facts and information about mythology and current scientific knowledge of the planets, moons, and other objects in our solar system and beyond.

Dec 6, 2019 · The Planets of the Solar System Detailed information and facts about the eight planets and five dwarf planets in our solar system.

Mar 17, 2020 · The planets of our Solar System are listed based on their distance from the Sun. There are, of course, the dwarf planets Ceres, Pluto, Haumea, Makemake, and Eris; however, they are in a different class. Among the dwarf planets, Pluto was listed as a planet the longest. This all changed in 2006 when the Astronomical Union – IAU – finally ...

The gas planets are composed primarily of hydrogen and helium and generally have low densities, rapid rotation, deep atmospheres, rings and lots of satellites. by size: small planets: Mercury, Venus, Earth, Mars. The small planets have diameters less than 13000 km. giant planets: Jupiter, Saturn, Uranus and Neptune.

Sep 29, 2020 · The eight planets in our Solar System, in order from the Sun, are the four terrestrial planets Mercury, Venus, Earth, and Mars, followed by the two gas giants Jupiter and Saturn, and the ice giants Uranus and Neptune. These are the eight planets of our Solar System; however, there is a ninth, or at least, there used to be a ninth planet, namely ...

It’s interesting to note that Venus rotates in the opposite direction to most planets, including Earth. Continuing our journey, we’ll visit Mars. Mars has the tallest volcano in the solar system, Olympus Mons, three times the height of Mount Everest.

Sep 25, 2019 · Mercury's axis has the smallest tilt of any of the Solar System's planets at about 1 ⁄ 30 degrees, while its orbital eccentricity is the largest of all known planets in the Solar System. Mercury's distance from the Sun is only about two-thirds or 66%, of its distance at aphelion, at its aphelion it is 0.44 AU away from the Sun.

Oct 31, 2023 · Frequently asked space questions to help you learn about space, astronomy, our solar system, the planets, and beyond!

Sep 26, 2019 · The title The Nine Planets is somewhat misleading. In addition to the (eight) planets and their satellites the solar system contains a large number of smaller but interesting objects. Small Bodies. There are thousands of known asteroids and comets and undoubtedly many more unknown ones. Most asteroids orbit between Mars and Jupiter.

The Nine Planets is a collection of information about our Solar System intended for a general audience with little technical background. No special expertise or knowledge is needed; all technical and astronomical terms and proper names are defined in the glossary.