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Visit this interactive site to explore the orbits of planets and their moons in our solar system and also in a wide selection of extrasolar planetary systems.
Derivation of acceleration for a particle in a radial orbit in Schwarzchild geometry which, surprisingly, depends on its trajectory.
Planetary exploration vessels like Voyager I and Voyager II made use of propulsion maneuvers which gained energy from the planets and moons they passed.
Pierre-Simon Laplace (1749 - 1817) was a French mathematician, astronomer, and physicist who is best known for his investigations into the solar system in particular the orbits of planets.
Shows cannonball projected off mountain. Different speeds produce different results. I particularly liked the "touch" when the ball completed an orbit and returned to where it left the mountain!
Description of calculation to find an escape velocity such as for an object launched from earth to avoid orbit.
A relatively basic animation that allows you to view the entire Solar system, or just the inner planets (through the orbit of Mars).
What shape is the Earth's orbit? How doe seasons work? Test your knowledge in this quiz aimed at revealing common misconceptions.
A really interesting data visualisation of all the planets Kepler has found, complete with information about their size, temperature, and distance and period of orbit.
The reason behind why all the planets rotate in the same direction.
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