Tag Archives: Kuiper Belt

Introduction to the Solar System: Crash Course Astronomy #9

The Solar System is the name we give to our local cosmic backyard. A better way to think of it is all the stuff held sway by the Sun’s gravity: The Sun itself, planets, moons, asteroids, comets, dust, and very thin gas. If you took a step back — well, a few trillion steps back… Read More »

All About Pluto and Dwarf Planets for Kids: Astronomy and Space for Children – FreeSchool

You’re watching FreeSchool! Pluto, the ninth-largest body orbiting the Sun, has been a matter of contention in recent years. Originally considered a planet following its discovery in 1930, Pluto was regarded as the ninth planet in the solar system for more than 75 years. In 2006, following the discovery of several other small planet-like objects… Read More »

All About Comets for Kids: Astronomy and Space for Children – FreeSchool

You’re watching FreeSchool! Born in the dark outer reaches of our solar system, comets are lonely wanderers. For thousands of years, comets have drawn the attention of philosophers and astronomers. Many ancient peoples from cultures all over the world believed that comets were a sign, either of good fortune or disaster. Comets were thought to… Read More »

Evidence of a Ninth Planet

What we have discovered is that numerous features of the Kuiper Belt, a field of icy debris beyond the orbit of Neptune, can be understood if the solar system possesses an additional ninth planet that resides well beyond the orbits of the known planets. When we looked at the outer solar system we realized that… Read More »