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# Who used detailed astronomical data at his laws of planetary motion?

## Who used detailed astronomical data at his laws of planetary motion?

Johannes Kepler
Tycho Brahe’s accurate observations of planetary positions provided the data used by Johannes Kepler to derive his three fundamental laws of planetary motion.

### Which astronomer solved the problem of retrograde motion and how did he do it?

Kepler’s laws. The Martian problem, which Kepler said he would solve in eight days, took nearly eight years. Astronomers had long struggled to figure out why Mars appeared periodically to walk backward across the night sky. No model of the solar system — not even Copernicus’ — could account for the retrograde motion.

Which astronomer was responsible for the 3 laws of planetary motion?

johannes Kepler
Knowing then that the orbits of the planets are elliptical, johannes Kepler formulated three laws of planetary motion, which accurately described the motion of comets as well. Kepler’s First Law: each planet’s orbit about the Sun is an ellipse.

Who came up with the laws of the Universe?

Sir Isaac Newton developed the three basic laws of motion and the theory of universal gravity, which together laid the foundation for our current understanding of physics and the Universe.

## What did Galileo discover?

Ganymede
EuropaIoCallistoRings of Saturn
Galileo Galilei/Discovered

### What did Galileo do?

Galileo was a natural philosopher, astronomer, and mathematician who made fundamental contributions to the sciences of motion, astronomy, and strength of materials and to the development of the scientific method. He also made revolutionary telescopic discoveries, including the four largest moons of Jupiter.

Claudius Ptolemy
The most important solution to this problem was proposed by Claudius Ptolemy in the 3rd century AD. He argued that planets move on two sets of circles, a deferent and an epicycle. This explained retrograde motion while keeping the planets in their circular orbits around the Earth.

Who discovered retrograde motion of Mars?

In the 1500s, Copernicus explained retrograde motion with a far more simple, heliocentric theory that was largely correct. Retrograde motion was simply a perspective effect caused when Earth passes a slower moving outer planet that makes the planet appear to be moving backwards relative to the background stars.

## Who discovered the three laws of motion?

Isaac Newton
Newton’s laws of motion, three statements describing the relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundation of classical mechanics.

### Who created the laws of physics?

Isaac Newton is popularly remembered as the man who saw an apple fall from a tree, and was inspired to invent the theory of gravity. If you have grappled with elementary physics then you know that he invented calculus and the three laws of motion upon which all of mechanics is based.

Who created the laws of nature?

What we call the laws of nature are then just patterns within this Humean mosaic (named after the philosopher David Hume). This is the idea behind best systems analysis, an approach developed largely by the American philosopher David Lewis in the second half of the twentieth century.

Who discovered science?

The Lagoon: How Aristotle Invented Science. Aristotle is considered by many to be the first scientist, although the term postdates him by more than two millennia. In Greece in the fourth century BC, he pioneered the techniques of logic, observation, inquiry and demonstration.

## Who was the first scientist to calculate the motion of the planets?

Using detailed measurements of the path of planets kept by Danish astronomer Tycho Brahe, Johannes Kepler (1571–1630) determined that planets traveled around the sun not in circles but in ellipses. In so doing, he calculated three laws involving the motions of planets that astronomers still use in calculations today.

### Who are the most famous scientists in astronomy?

Famous Astronomers | List of Great Scientists in Astronomy. Persian astronomer Abd al-Rahman al-Sufi (903–986), known as Azophi to Westerners, made the first known observation of a group of stars outside of the Milky Way, the Andromeda galaxy.

Who was the astronomer who set up the Solar System?

In ancient Greece, astronomer and mathematician Claudius Ptolemy (A.D. 90–168) set up a model of the solar system in which the sun, stars, and other planets revolved around Earth. Known as the Ptolemaic system, it remained in place for hundreds of years, though it turned out to be flat wrong.

How did Johannes Kepler contribute to the theory of planetary motion?

At about the same time, German mathematician Johannes Kepler was publishing a series of laws that describe the orbits of the planets around the Sun. Still in use today, the mathematical equations provided accurate predictions of the planets’ movement under Copernican theory.