[DOC] [TLE] Kepler's laws of planetary motion - Wikipedia [PAR] In astronomy, Kepler's laws of planetary motion are three scientific laws 
describing the motion of planets around the Sun. Figure 1: Illustration of Kepler's 
three laws with two planetary orbits. (1) The orbits are ellipses, with focal points 
1 and 2 for the first planet and ... The orbit of a planet is an ellipse with the Sun 
at one of the two foci. [DOC] [TLE] Kepler's Three Laws of Planetary Motion - The Physics Classroom [PAR] ... about the sun is elliptical in shape, with the center of the sun being located at 
one focus. ... Kepler's first law is rather simple - all planets orbit the sun in a path 
that resembles an ellipse, with the sun being located at one of the foci of that 
ellipse. ... How did Newton Extend His Notion of Gravity to Explain Planetary 
Motion? [DOC] [TLE] Kepler's Laws - HyperPhysics [PAR] The Law of Periods: The square of the period of any planet is proportional to the 
cube of the ... All planets move in elliptical orbits, with the sun at one focus. ... 
Newton first formulated the law of gravitation from Kepler's 3rd law. ... Data 
confirming Kepler's Law of Periods comes from measurements of the motion of 
the planets. [DOC] [TLE] Planetary Motion: The History of an Idea That Launched the ... [PAR] (Brahe, who had his own Earth-centered model of the Universe, withheld the bulk 
... If you draw a triangle out from the Sun to a planet's position at one point in time 
... law of orbital motion) led to the realization of what became Kepler's first law: 
that the planets move in an ellipse (a squashed circle) with the Sun at one focus... [DOC] [TLE] Kepler's Laws and Newton's Laws [PAR] The orbit of a planet about the Sun is an ellipse with the Sun at one focus. ... 
Kepler's Second Law states that for any two positions of the planet along the ... 
We have defined the semimajor axis of the orbit above, in our discussion of 
Kepler's First Law. ... One way to describe the motion of an object it to specify its 
position at... [DOC] [TLE] Kepler's laws of planetary motion | astronomy | Britannica.com [PAR] Kepler's laws of planetary motion, in astronomy and classical physics, laws ... 
planets move about the Sun in elliptical orbits, having the Sun as one of the foci. 
... he formulated his famous law of gravitation between Earth and the Moon and ... 
According to the first law, the paths of planets are ellipses with one focus located. [DOC] [TLE] Kepler's Laws of Planetary Motion - Cseligman.com [PAR] Kepler originally discovered two Laws of Planetary Motion, which allowed him ... 
As a result of his investigations into the latter problem he discovered a third ... 
Kepler's First Law: The orbits of the planets are ellipses, with the Sun at one focus 
of ... but in motions which are in a constant state of flux or change, going faster as
... [DOC] [TLE] Kepler's laws of planetary motion | Define Kepler's laws of planetary ... [PAR] Three laws devised by Johannes Kepler to define the mechanics of planetary 
motion. The first law states that planets move in an elliptical orbit, with the Sun... [DOC] [TLE] Kepler and the First Law of Planetary Motion [PAR] That is the discovery of Kepler's Laws of Planetary Motion. I will concentrate on 
his first law: the orbits of the planets are ellipses with the sun at one focus. ... Of 
his interest in the subject, Kepler states, "these were prescribed studies and 
nothing... [DOC] [TLE] What are Kepler's laws of motion and what exactly do they mean? [PAR] That's why Kepler is by all means among the key players of one of the most ... 
The first law states that each planet moves around the sun in an ellipse, with the 
sun at ... is the line drawn from the sun to any point in a planet's orbit, and stated 
that the ... He abandoned his cherished idea of a

Question: His first law of planetary motion states the planets' orbits are ellipses with the sun at one focus
Answer: Johannes Kepler