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2. Solar System model - Wikipedia

   en.wikipedia.org/wiki/Solar_System_model

   Solar System model. Solar System models, especially mechanical models, called orreries, that illustrate the relative positions and motions of the planets and moons in the Solar System have been built for centuries. While they often showed relative sizes, these models were usually not built to scale. The enormous ratio of interplanetary ...

3. Solar System - Wikipedia

   en.wikipedia.org/wiki/Solar_System

   The largest such scale model, the Sweden Solar System, uses the 110-metre (361 ft) Avicii Arena in Stockholm as its substitute Sun, and, following the scale, Jupiter is a 7.5-metre (25-foot) sphere at Stockholm Arlanda Airport, 40 km (25 mi) away, whereas the farthest current object, Sedna, is a 10 cm (4 in) sphere in Luleå, 912 km (567 mi) away.

4. Historical models of the Solar System - Wikipedia

   en.wikipedia.org/wiki/Historical_models_of_the...

   Heliocentric model from Nicolaus Copernicus' De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres). During the 16th century Nicholas Copernicus, in reflecting on Ptolemy and Aristotle's interpretations of the Solar System, believed that all the orbits of the planets and Moon must be a perfect uniform circular motion despite the observations showing the complex ...

5. Formation and evolution of the Solar System - Wikipedia

   en.wikipedia.org/wiki/Formation_and_evolution_of...

   The Solar System travels alone through the Milky Way in a circular orbit approximately 30,000 light years from the Galactic Center. Its speed is about 220 km/s. The period required for the Solar System to complete one revolution around the Galactic Center, the galactic year, is in the range of 220–250 million years. Since its formation, the ...

6. History of Solar System formation and evolution hypotheses

   en.wikipedia.org/wiki/History_of_Solar_System...

   The most widely accepted model of planetary formation is known as the nebular hypothesis.This model posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years.

7. Standard solar model - Wikipedia

   en.wikipedia.org/wiki/Standard_solar_model

   The standard solar model ( SSM) is a mathematical treatment of the Sun as a spherical ball of gas (in varying states of ionisation, with the hydrogen in the deep interior being a completely ionised plasma ). This model, technically the spherically symmetric quasi-static model of a star, has stellar structure described by several differential ...