The solar system contains eight planets. In order of their distance from the sun, the eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. From 1930 until 2006, Pluto was considered the sol... More » Science Astronomy Planets

There are four planets in the solar system that have rings around them, namely Jupiter, Saturn, Uranus and Neptune. These planets are classified as "jovian" planets, and they are massive balls of gas surrounded by rings ... More »

According to NASA, astronomers have discovered at least 146 moons orbiting planets in Earth's solar system. As of 2014, 27 more moons await official confirmation of their discovery. This total does not include the six mo... More »

Simply put, planets in the solar system revolve around the sun and the solar system is held together by its own gravitational field. The solar system consists of nine planets, the sun, each planet's moons, comets, astero... More »

The names of the nine planets in the solar system are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, astronomers have reclassified Pluto as a dwarf planet. More »

To make a model of the solar system, hang circles representing the planets from a larger circle of cardboard. By varying the length of the string and hanging the cardboard planets in orbital circles, the model is even mo... More »

Tycho Brahe's model of the solar system had the earth motionless and fixed at the center with the sun and stars moving around the earth, but he incorporated Copernicus' heliocentric model so that the other, non-Earth pla... More »