
How Did the Solar System Form? - NASA Space Place
Aug 29, 2022 · These icy bits haven’t changed much at all since the solar systems formation. In fact, it is the study of asteroids and comets that allows scientists to piece together this whole …
What Is the Kuiper Belt? - NASA Space Place
Sep 25, 2025 · In 1951 he had the idea that a belt of icy bodies might have existed beyond Neptune when the solar system formed. He was trying to explain where comets with small …
Small bodies have provided scientists with information ranging from the age of the solar system (and of the Earth) to the possibility that a supernova might have been responsible for creating …
What Is an Asteroid? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Our solar system began about 4.6 billion years ago when a big cloud of gas and dust collapsed. When this happened, most of the material fell to the center of the cloud and …
How Old Are Galaxies? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Astronomers believe that our own Milky Way galaxy is approximately 13.6 billion years old. The newest galaxy we know of formed only about 500 million years ago.
What Is Dark Matter? | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Clumps of regular matter smashed into each other, and the planets in our solar system began to form around the Sun. Stars rotate around the center of a galaxy, a little like …
Solar System | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Answer your questions: How many moons do other planets have? What's it like inside Jupiter? How did the solar system form? Why does Saturn have rings? Games Crafts
All About Pluto | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · With New Horizons, we are visiting and learning about the objects at the very edge of our solar system. They may help us understand how our solar system formed.
All About the Moon | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · Scientists believe that the Moon formed early in the solar system’s history after Earth and an object about the size of Mars smashed into each other. The impact sent chunks …
Dwarf planets can teach us a lot about how our solar system formed and how it works. Because they are smaller, dwarf planets change less than planets, essentially freezing the conditions …