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The development of celestial mechanics

The development of celestial mechanics

This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.



Kepler, Galileo Galilei, Newton, Einstein, Copernicus, Tycho Brahe, Bruno, Giordano Bruno, astronomer, physicist, heliocentric, model of the universe, Solar System, Universe, elliptical path, day, planet, moon, Jupiter, Milky Way, Inquisition, focal point, law, infinite, burning at the stake, calculus, gravitation, law of force, relativity, theory of relativity, spacetime, speed of light, mechanics, astronomy, astrophysics, physics, scientist, observation

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  • Which mechanical device is used for measuring uniform linear motion?
  • The moons of which planet did Galileo discover?
  • Which of these astronomical models was NOT supported by Galileo Galilei?
  • By what method did Galileo Galilei revolutionise science?
  • What is a theory?
  • A ship moves across a completely flat sea in a straight line and at a steady pace. Which of these statements is wrong?
  • An object presses against the ground with a force of 10 N. With what force does the ground press against the object?
  • What happens to an object moving in uniform linear motion if no force acts upon it?
  • Why does an object moving on a flat surface eventually stop?
  • Two objects at rest, one lighter and one heavier, are accelerated by equal forces. What is the acceleration of the objects?
  • Two objects at rest, one weighing 1 kg and the other 10 kg, are accelerated by equal forces. What is the acceleration of the objects?
  • Which of these exerts a greater gravitational force on the other body: a ball on the Earth, or the Earth on a ball?
  • Which of these mathematical methods was NOT presented by Newton?
  • The planets orbit the Sun in ... orbits.
  • Where is the speed of the planets higher?
  • Whose astronomical data did Kepler use to develop his laws of planetary motion?
  • How many laws of planetary motion did Kepler formulate?
  • Which of Kepler's following acts was the most important?
  • Who was Tycho Brahe's assistant?
  • Which of these astronomers used Tycho Brahe's measurement data to develop his laws of planetary motion?
  • Tycho Brahe contributed to the development of science through...
  • Is it true that Tycho Brahe thought that the Earth orbits the Sun?
  • How did Tycho Brahe prove that the heavens are not eternal and constant?
  • What is true of the heliocentric model?
  • According to Copernicus, the planets orbit the Sun in what orbits?
  • Why did Copernicus insist on the idea of circular orbits?
  • What is the Copernican Revolution?
  • Which of these scientists also developed a heliocentric model beside Copernicus?
  • How did Giordano Bruno die?
  • Why was Giordano Bruno sentenced to death?
  • In Giordano Bruno's view, stars are...
  • What did Giordano Bruno state regarding the size of the Universe?
  • Is it true that Giordano Bruno used mathematical methods and precise observations in working out his astronomical model?
  • Which of these theories was NOT formulated by Einstein?
  • Which force does the theory of relativity explain?
  • Which of these is NOT relative according to the special theory of relativity?
  • What happens to a fast moving clock?
  • With what does the theory of relativity explain gravity?
  • What would happen if we moved at the speed of light?
  • Suppose we were moving towards the light source at half of the speed of light (150,000 km/s). What would be the measured speed of light?
  • The watch of an observer moving relative to the Earth slows down. What change will the observer see on the watches located on the Earth?
  • Which branch of science was NOT influenced by Ptolemy's work?
  • Which describes the Ptolemaic system the best?
  • What is the epicycle?
  • Where did Ptolemy live and work?
  • When did Ptolemy's astronomical model become obsolete?


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