Planet Facts

A planet is a large object such as Jupiter or Earth that orbits a star. It is smaller than a star, and it does not make light. Planets are ball-shaped (spheres). Objects that orbit planets are called moons. There are eight planets in the Solar System. See the fact file below for more information about the planets.

  • All eight planets can be seen with a small telescope or binoculars.
  • Venus is the brightest planet and can be seen without a telescope.
  • The earth has more water than it has land.
  • Mars is home to the largest volcano in our solar system. It is almost 17 miles high.
  • Jupiter is the largest planet. All of the other planets could fit inside Jupiter. The red spot on Jupiter is the most violent storm in the Universe.
  • Saturn is the lightest of all the planets. It is also the second largest.
  • One year on Neptune lasts 165 Earth years!
  • Uranus orbits while lying on its side, because its axis is at 97 degrees.
  • Mercury and Venus have no moons. The Earth has 1 moon. Mars has 2 moons. Neptune has 13 moons. Uranus has 21 moons. Saturn has 33 moons. Jupiter has 63 moons.
  • All of the outer planets, (Jupiter, Saturn, Uranus, Neptune and Uranus) have rings.

External resources

Planets for Kids
A Parade of New Planets
Amazing Space
Bodies in the Solar System
Exploring Planets
From Mercury to Pluto
Ordering the Planets
Planetary Fact Sheet

Mercury

Venus

Earth

Mars

Jupiter

Cassini Image Gallery:  Jupiter Encounter
Eleven New Moons for Jupiter
Jupiter: Millennium Flyby
Jupiter’s Ring System
NSSDC Photo Gallery: Jupiter
Satellites of Jupiter
Solar System Exploration: Jupiter
SpaceTech’s Orrery: Jupiter: Giant Failed Star
The Planet Jupiter
Welcome to the Planets: Jupiter
Windows to the Universe: Jupiter

Saturn

Uranus

Neptune

Pluto

Read this article to find out why Pluto is now
considered a “Dwarf Planet.”
Is Pluto a Planet?

Fast Facts Resources
Wikipedia
The Nine Planets Solar System Tour
Planets:  Zoom Astronomy