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Learn about the history and types of solar system models, especially mechanical models called orreries, that illustrate the relative positions and motions of the planets and moons. Compare different permanent and temporary orreries and scale models around the world.
An overview of the Solar System, its regions, celestial objects, structure, composition, history, exploration and lists. Learn about the Sun, planets, moons, dwarf ...
Learn about the Sun and the objects that orbit it, including the eight planets, the nine dwarf planets, and the small bodies such as asteroids, comets, and moons. Explore the formation, evolution, and features of the Solar System and its place in the Milky Way galaxy.
A planet is a large, rounded astronomical body that orbits a star or stellar remnant. Learn about the history, theory, and diversity of planets, from the eight in the Solar System to the thousands of exoplanets discovered outside it.
An orrery is a device that shows the relative positions and motions of the planets and moons around the Sun, usually based on the heliocentric model. Learn about the history, types and examples of orreries, from ancient Greek mechanisms to modern planetaria.
Learn how the Solar System formed from the gravitational collapse of a fragment of a giant molecular cloud about 4.6 billion years ago, and how it has evolved since then. Explore the history, evidence, and challenges of the nebular hypothesis, and the fate of the Sun and its planets.
Mercury is the smallest and innermost planet in the Solar System, with a highly elliptical orbit and a large iron core. Learn about its physical characteristics, orbit, rotation, surface features, history of observation, and more from this comprehensive article.
Epiphany is a sidekick alien who can transform into different things magically in the children's animated series Creative Galaxy. The series also features various planets where Arty and his friends explore art and creativity, such as Painting Planet, Fabric Planet, and Paper Planet.