Our solar system has eight planets, and five dwarf planets - all located in an outer spiral arm of the Milky Way galaxy called the Orion Arm.
Why Are Planets Round? NASA Space Place – NASA Science for Kids
Solar System Exploration - NASA Science
Science Missions - NASA Science
A Wonderland of Science Awaits – Exoplanet Exploration: Planets Beyond our Solar System
Planets - NASA Science
Solar System - Wikipedia
What Is a Planet? NASA Space Place – NASA Science for Kids
NASA Wants to Photograph the Surface of an Exoplanet
Astronomers Discover Planets in NASA Kepler's Final Days of Observations
11 Inspiring Images of Planets Like Earth
NASA's Hubble Telescope makes first atmospheric study of Earth-sized exoplanets – Exoplanet Exploration: Planets Beyond our Solar System