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1630 BCE
Johannes Kepler
Johannes Kepler was a sickly child and his parents were poor. Yet he made great discoveries.
How did Kepler's idea change the world?
He discovered that the Earth and planets travel about the Sun in elliptical orbits.
They are faster in their orbits when they are closer to the Sun; this became Kepler's Second Law.
Formulating the Laws of Planetary Motion.
The planets moved as a result of physical forces transformed astronomy from a geometrical data-matching . -
Period: 1571 to
Johannes Kepler
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Period: to
Isaac newton
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Isaac newton
7.5 inch 104x Gregorian reflector.Isaac Newton discovered gravity.
Isaac Newton's mother wanted him to be a Farmer.
Isaac Newton Kept a Journal of his Sins.
Isaac Newton did not take criticism well.
Sir Isaac Newton: Knighted by Queen Anne. -
Charles Messier
He worked on the discovery of comets, which led to the compilation of a catalog of deep-sky objects known today as the Messier Catalogue of nebulae and star clusters.
He discovered forty nebulae and 13 comets.
He was the first to compile a systematic catalog of nebulae and star clusters.
He invented the 7.5 inch 104x Gregorian reflector.
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Pierre Simon Laplace
He made crucial contributions in the arena of planetary motion by applying Sir Isaac Newton's theory of gravitation to the entire solar system.
He simplified the solution of many differential equations that describe physical complex number frequency parameter. with real numbers σ and ω.
This Helped solving linear ordinary differential equations.
it converts an ODE into an algebraic equation of the same order that is simpler to solve
He was responsible for algebra. -
Heincrich Wilhelm Matthias
He discovered the asteroids Pallas and Vestal, as well as five comets.
He was the first to detect the comet of 1815 -
Friedrich Bessel
He made the first accurate measurement of the position of a star.
Acoustics was the first for describe the circular membranes behavior. called, Cylindrical symmetry.
He was an Astronomer, mathematician, physicist, and geodesist. . -
Annie Cannon
she revolutionized the way scientists classify stars
.Allowing us to divide stars into several spectral types depending on the temperature of the star
The lunar crater Cannon is named after her.
She gave us a way to remember the spectral classification of stars.
Even though she was a deaf and an American Astronomer. -
Henrietta Swan Leavitt
She discovering about 2,400 variable stars between 1907 and 1921
The fundamental brightness of a Cepheid is directly related to its pulse rate.
Edward Pickering,
Harvard Computers
Cambridge, Massachusetts. -
Alert Einstein
His devising theory of relativity, which revolutionized our understanding of space, time, gravity, and the universe,.
and the photoelectric effect
He renounced his German citizenship when he was 16
He married the only female student in his physics class -
Ejnar Hertzs
He revealed important information about the stars plotted on them.
When did Ejnar Hertzsprung discover two stars?
1909
In 1909 Hertzsprung noticed that two other stars,
Leiden Observatory in the Netherlands, from 1937 as director.
He discovered the actual motions of stars in the sky are larger for nearby stars than for distant stars.