The Solar System


The Solar System

Learn about the many pieces that make up our solar system in this Sky Science backgrounder

Learn More about Astronomy 101: The Solar System

This backgrounder explains the difference between planets, dwarf planets and small solar system bodies.

Learn More about Classifying objects in the solar system

In this case study, students will analyze video and print resources to explore the characteristics and potential effects of near-space objects in our solar system on the Earth.

Learn More about Killer asteroids case study

Join Paxi on a journey through our Solar System, from the rocky inner planets close to the Sun, past the giant planets to the freezing edge, the home of comets. (5:18 min.)

Learn More about PAXI - THE SOLAR SYSTEM (ESA)

New definition of 'planet' sets Pluto in a new scene.

Learn More about Pluto joins a new club

Scientists have found thousands of planets that orbit other stars, just like Earth orbits the Sun. Some of them might even be able to support life.

Learn More about Searching for exoplanets around the star next door

Most planets have several moons, and many of these moons have fascinating characteristics.

Learn More about The many moons of our solar system

When Pluto was discovered in 1930, it became the ninth planet in our solar system. Find out why the International Astronomical Union "demoted” Pluto in 2006.

Learn More about Why isn't Pluto a planet any more?