Astronomy
Category: History
Updated: 9 months ago
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Created byPranav Grover (S)
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Events
Ancient Greece (300 BC). Aristarchus of Samos
postulated he could find the size of Earth by
measuring its shadow during a lunar eclipseRenaissance (1543). Copernicus proposes the
first heliocentric model.Enlightenment (1781). Herschel discovers Uranus.The Zodiac is discovered to decipher and
understand the divine messages (500 BC).Stonehenge is constructed (1600 BC). It is
suggested that it operated as an astronomical
calendar, with points corresponding to
astrological phenomena such as solstices,
equinoxes, and eclipses.Modern Cosmology (1931). Georges Lemaître
proposes an early version of The Big Bang
theory.Carl Sagan's TV show "Cosmos" airs and is a
smash hit that popularized cosmology and
science. Carl Sagan is also a pioneer in the field
of Exobiology and was among the first to
determine that life could have existed on Mars. (1980)Claudius Ptolemy proposes the "Ptolemaic
system" which is one of the first models of the
solar system. Note that it is wrong since it
proposed that the Earth is the center of the
solar system. Ptolemy also named many
constellations whose names are still used to
this day. (150)Kepler discovered that planets move in
elliptical orbits instead of circular ones. This
leads him to propose the 3 laws of planetary
motion. (1618)Galileo makes his first telescope which
effectively makes him the Michael Jordan of
observing the universe. He also discovers four
of Jupiter's moons and Saturn's rings. (1609)Giovanni Cassini calculated the
orbital periods of Jupiter and Mars. In addition,
he found the gap in Saturn's rings and the
planet's four moons. (1666)Hubble proposes that the universe is
expanding. His findings prove that there is
more than one galaxy in the solar system.
(1929)Caroline Rose Herschel becomes the first
woman to discover a comet. She goes on to
discover many other comets. (1786)Halley's comet returns just as Edmund Halley
predicted before his death. Halley is known for
pioneering the analyzation of comets' orbits. (1758)Periods
Prehistoric (40,000 BC to 10,000 BC).
Representations of the Sun, Moon, and Stars
are carved on stone
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