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384 BCE
Aristotle
Aristotle was a fantastic Philosopher and polymath. Aristotle wrote 200 treatises in his lifetime. Only which 31 of them survived. Aristotle was very intelligent he was a student of Plato. Aristotle was born in 384 BCE. -
100 BCE
Ptolemy
Ptolemy was Egyptian astronomer mathematician and geographer of Greek. He believed that the solar system revolved around Earth and that Earth is stationary. Ptolemy Was born 100 BCE and died in 170 BCE. -
1473
Copernicus
Copernicus Mathematician and astronomer who mad a model of the unversed where the sun was at the center and the solar system revolved around the sun instead of the earth. He was born in 1473 and died in 1543 just before his death the it was the scientific revolution. -
Dec 14, 1546
Tycho Brahe
Tycho was described as "The first competent mind in modern astronomy to feel ardently the passion for exact empirical facts." His observations were 5 times more accurate then the best observations at that time. he was the last major naked eye scientist working without telescopes. -
Feb 15, 1564
Galileo
Galileo was an Italian astronomer, physicist, and engineer. He was called "father of observation astronomer." Galileo improved a geometric and military compass for gunners and surveyors. In 1609 Galileo was the first a refracting telescope to study the stars. -
1570
Hans Lippershey
German Dutch spectacle-maker. He is famously known for inventing the telescope. He is also known for the earliest written letter of the refracting telescope. -
Dec 27, 1571
Johannes Kepler
Kepler is a German astronomer, mathematician, and astrologer. He is best known for his laws of planetary motion. Kepler thought he revealed Gods geometrical plan for the universe because of his Mysterium Cosmographicum. -
Giovanni Cassini
Cassini was mathematician astronomer, and a engineer. The cassini space probe named after him was the fourth to visit planet Saturn and the first to orbit around it in 1997. Cassini observed and published surface markings on mars -
Difference between re-fracturing and reflecting telescope
Reflecter telascopes uses 2 mirrors instead of 2 lenses. Isaac newten deveolped this telscope. A refracter telescope uses objective lens oppistite the eye pieces end. -
sir isaac newten
Isaac cotributed lots of astronmoy in his life he invented caculas and provided a clear understainding to optics. But one tthing he was mainly known for his worl on forces and especially his work on the devolpment on gravity -
William Herschel
William discoverd Uranus he hypothesized that nebulae are composed of stars and he devolped a theory of star evolution. -
Percival lowell
Perciaval predicted the existence of a planet beyond the orbit of neptune and initiated the serch that ended the dicovery of pluto -
Neil Armstrong
Neil was an American astronaut and auronatical enigineer who was the first person to ever step foot on the moon. He died in 2012 and he was also a test pilot. -
Yurin Gagarin
Yuri was the first human to journey into outer space when his Vostok spacecraft completed one orbit of the Earth in april 12 1961 -
Karl Janksy
Karl first discoverd the radio waves enmanating from the milky way He is thought to be one of the founding figures of radio astronmy. -
Edwin Hubble
Edwin studies of spiral nebulae proved that there are exitence of other galaxies. He also discoverd that many objesct are thought to be clouds of dust were actully galexies. -
Albert Einstein
Einstin was a theroacrical phycisist who devolped the theory of realivity one of the two pillars of moder physics. His wprl also know for its influance on the philsophy of science. -
Sputnik
Sputnik was the worlds first satilite. it proved that humans could live and work in space. Eight years later. Apollo landed on the moon thanks to sputnik -
The Apollo Program
The Apollo Program was the third United States human spaceflight to land the first human on the moon from 1969 to 1972. It went from 1960 to 1972. -
John Glenn
John was the first American to orbit Earth ciclying it 3 times in 1962. He died at age 96 in 2016. He was a United states marine stronat engineerer business man and politican. -
Enjar Hertsurg
Enjar classified types of stars by realating their colar to their absoulte brightness. an accomplishment of fundamental importance to moder astronmy. -
The First Space Shuttle Flight
Launche April 12 1981 retured April 14 from orbiting the Earth 36 times. It was the first manned space flight since 1975. It carried 2 people a pilot and a commander -
Mars Pathfinder Expedition
This machine became the first rover to operate outside the Earth system. It landed with a base station with a rover probe on mars in 1997. -
Cassini Orbiter
The cassini Huygens mission was to send a probe called cassini to study saturn. Cassini spent 20 years active in space with 13 years spent orbiting Saturn. -
The sky this week
The waning crescent Moon stars in a series of conjunctions it this week's predawn sky as it passes Jupiter, Venus, and Saturn
