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Isaac Newton
Isaac Newton formulated the laws of gravity and mechanics. He applied it to our planetary syestem. -
Period: to
History of Science
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Edmond Halley
Edmond Halley used Newtons laws to predict that a comet would reappear 76 years later, and it did in 1758. This showed that objects in space are governed by the laws of mechanics. -
William Herschel
William Hershcel proposed that some nubulae are groups of stars. -
Gustav Kirchhoff
A German physicist investigated the solar spectrum by passing through a spectroscope. Spectroscopy determines the composition and movement of stars. -
Albert Einstein
He proposed a special theory of relativity. Concerned with the propagation of electric and magnetic phenomena in space and time . The theory that light is transmitted in small packets and the famous equation linking energy and mass: E=mc2 -
Albert Einstein
Einstein proposed the general theory of relativity, dealing with gravitation, space and time. He hypothesised that space-time is curved in the presence of a strong gravitational field. -
Wilhelm de Sitter
He was a Dutch astronomer and published a series of papers describing some astronomical consequences of Einstein's general theory of relativity. -
Harlow Shapley
An American astronomer proposed that the Milky Way galaxy is much larger than previously thought, and that the Sun is not the centre. -
Arthur Eddington
He led an expedition to observe a solar eclipse in order to detect the bending of light rays passing near the sun. -
Edwin Hubble
He found that some nebulae contain stars. -
Georges Lemaitre
He firmulated The Big Bang Theory. He proposed the universe began with a big explosion. -
Edwin Hubble
Using the Doppler effect, he found other galaxies seem to be moving away from the Milky Way. This indicates that the Universe is expanding in time. -
Robert Wilson & Arno Penzias
Observed background microwave radiation in space. -
Stephen Hawking
He suggested that after the Big Bang mini black holes were formed with enormas masses. He spectulated that sharply curved space-time can give rise to the creation of both particles and anti-particles.
