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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.
The planets are placed on concrete posts so that their distances to the sun are in scale. The sizes of the planets are also in scale: e.g. the size of Mercury is only 4.9 millimeters. There are explanatory texts on the model and the planets near the models in special tables. The texts are in Finnish, Swedish and English.
The nebular hypothesis is the most widely accepted model to explain the formation and evolution of the Solar System and other planetary systems. It suggests the Solar System is formed from gas and dust orbiting the Sun which clumped up together to form the planets.
An overview of the Solar System, its regions, celestial objects, structure, composition, history, exploration and lists. Learn about the Sun, planets, moons, dwarf ...
The nebular hypothesis is the most widely accepted model of planetary formation, based on the idea that the Solar System was formed by the gravitational collapse of a giant molecular cloud. Learn about its history, challenges, and variations, as well as other hypotheses such as the tidal hypothesis and the vortex model.
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.
Learn how astronomers measure distances to celestial objects using various methods and techniques. The cosmic distance ladder is a succession of steps based on different correlations and assumptions, from direct measurements to standard candles and geometric methods.
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.
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