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This is a simple model of how a gravitational assist (also known as a gravitational slingshot) works. The Parker Solar Probe, for instance, is going to interact with Venus seven times, each time increasing its speed and modifying its orbit. This will gradually bring the probe into an orbit that takes it extremely close to the Sun.

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This simulation shows the four inner planets of the solar system, as they orbit the Sun. Moving out from the Sun, we see Mercury, Venus, Earth, and Mars, in that order. The strip at the bottom shows what the other four objects look like in the sky, as viewed from an observer on whatever object is at the center.

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This simulation shows the energy associated with the Earth as it orbits the Sun. You can try different Earth's - our's is the one with v = 1.0 (roughly times 30000 m/s), the speed needed to go in a circle around the Sun.

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What keeps the Earth moving in its approximately circular path around the Sun? It's a combination of the 30 km/s speed of the Earth and the gravitational force exerted on the Earth by the Sun.

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What keeps the Earth moving in its approximately circular path around the Sun? It's a combination of the 30 km/s speed of the Earth and the gravitational force exerted on the Earth by the Sun.

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This is a binary system. The velocities of the two objects are initially equal-and-opposite (object 1's velocity directed down and object 2's directed up). You might expect them to have repeating orbits, but can you explain why there is often a drift of the orbits in one direction or another?

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This is like the previous simulation, but it shows the time evolution of the system. The objects start out with random velocities, and you can get some interesting patterns. Note that the particles are draggable and that you can adjust their masses with the sliders.

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Click-and-drag to move the particles around, and use the sliders to change their masses. These particles interact via gravity, so you can see the net gravitational force on each one as well as the individual gravitational forces.

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Gravitation: The Four Fundamental Forces of Physics #3

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Hank continues our series on the four fundamental forces of physics with a description of gravitation - the interaction by which physical bodies attract with a force proportional to that of their masses, and which is responsible for keeping planets in orbit, among other things.

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Costruisci il tuo sistema di corpi celesti e osserva la danza gravitazionale. Con questo simulatore di orbite puoi decidere le posizioni iniziali, le velocità e le masse di 2, 3 o 4 corpi, e farli orbitare tra loro.

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Visualizza la forza gravitazionale che due oggetti esercitano vicendevolmente. Cambia le proprietà degli oggetti per verificarne le variazioni di forza gravitazionale.

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Muovi il Sole, la Terra, la Luna ed una stazione spaziale per vedere come si influenzano reciprocamente le forze gravitazionali e le loro orbite. Visualizza le dimensioni e le distanze tra diversi corpi celesti; Elimina la forza di gravità per vedere cosa succede senza di essa!

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Onde gravitazionali - Relatività generale

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Uploaded by Treccani Scuola on 2016-11-25.

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Interazione elettrica e gravitazionale - Campo elettrico

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Uploaded by Treccani Scuola on 2016-11-12.

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parola fondamentale della fisica contemporanea

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Gravità, proprio come grave, ha la sua radice nella parola latina che indicava la pesantezza, e nei tempi antichi si pensava che la gravità fosse una proprietà di alcuni oggetti, quelli particolarmente pesanti, la proprietà che li porta a cadere verso il suolo se per esempio li lasciamo cadere dalla nostra mano.

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Il moto dei satelliti - La gravitazione dei satelliti

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Uploaded by Treccani Scuola on 2017-01-31.

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L’energia potenziale gravitazionale - La gravitazione

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Uploaded by Treccani Scuola on 2017-01-26.

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Uploaded by Treccani Scuola on 2016-11-12.

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La gravitazione universale - La gravitazione