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Tycho Brahe was a Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical observations
He discovered irregularities in the moons orbit and also contributed to the equipment used to observe space
“I conclude, therefore, that this star is not some kind of comet or a fiery meteor... but that it is a star shining in the firmament itself one that has never previously been seen before our time, in any age since the beginning of the world”

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Galileo used a telescope to discover things in space. his most famous discoveries are the 4 biggest moons of Jupiter. He is considered the father of observational astronomy. he helped create modern day astronomy.
"All truths are easy to understand once they are discovered; the point is to discover them"

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In the 17th century, Johannes Kepler discovered that the orbits along which the planets travel around the Sun are ellipses with the Sun at one focus, and described this in his first law of planetary motion. Later, Isaac Newton explained this as a corollary of his law of universal gravitation. This idea is still relevant and it helped the modern day understand how the world moves around the sun.

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In the 17th century, Johannes Kepler discovered that the orbits along which the planets travel around the Sun are ellipses with the Sun at one focus, and described this in his first law of planetary motion. Later, Isaac Newton explained this as a corollary of his law of universal gravitation. This idea is still relevant and it helped the modern day understand how the world moves around the sun.

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In the 17th century, Johannes Kepler discovered that the orbits along which the planets travel around the Sun are ellipses with the Sun at one focus, and described this in his first law of planetary motion. This contributed to the making of Newton’s law of universal gravitation

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Johannes Kepler was a German astronomer, mathematician, and astrologer. He is a key figure in the 17th-century scientific revolution
The rules helped the development of astronomy . He made the rules “All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun”

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A procedure that has been done since the 17th century consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
We still use this today and have used it to discover many things. It gave us basic rules to follow that helped us get to where we are in science

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The Scientific Revolution was a series of events that marked the emergence of modern science during the early modern period, when developments in mathematics, physics, astronomy, biology and chemistry transformed the views of society about nature
All the ideas helped even people today understand how the world works and helped develop basic rules for mathematics

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Nicolaus Copernicus was a Renaissance-era polymath who theory of the universe placed the Sun rather than Earth at the center of the universe
Copernicus Laid the foundation for modern day astronomy , he proposed most of the ideas that are still relevant
“To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.”

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It is the theory that challenged that the earth was the center and instead claimed the sun was the center of the solar system and maybe even the universe

This theory contributed to how the sun sets and it helped explain the solar system more

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Claudius Ptolemy was a Greek mathematician, astronomer, geographer and astrologer
He contributed to the science behind how the planets move and the sun

“Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.”  _ Ptolemy

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He was a Greek philosopher who contributed to how people think
“The whole is more than the sum of its parts.”

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This is the theory that the is the center of the universe

Without questioning if the earth is the center than there would be no astrology and all science could be different