The Solar System
Listen to an audio version of this page.
|What is the solar system?
It is our Sun and everything that travels around it. Our solar system
elliptical in shape. That means it is shaped like an egg.
The Sun is in the center of the solar system. Our solar system is always in motion. Eight known planets and their moons, along with
other space objects
the Sun. The Sun is the biggest object in our solar
system. It contains more than 99% of the solar system's
think the solar system is more than 4 billion years old.
Astronomers are now finding new objects far, far from the Sun which they call dwarf planets. Pluto, which was once called a planet, is now called a dwarf planet.
||Planets and Dwarf Planets|
||The Asteroid Belt|
Solar System Activities
|Show me the Level 2 version of this page.|
The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/ GSFC.
StarChild Authors: The StarChild Team
StarChild Graphics & Music: Acknowledgments
StarChild Project Leader: Dr. Laura A. Whitlock
Responsible NASA Official:
If you have comments or questions about the StarChild site, please send them to us.