Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it.
Aristarchus of Samos, was the first known person to have presented a heliocentric model of the solar system, placing the Sun, not the Earth, at the center of the known universe.
He also believed that the stars were very far away and not, as believed to lie just outside the orbit of Saturn.
Using the Moon as a datum, Aristarchus calculated that the Sun must be about 18 -> 20 times further away than the Moon. Although wrong, the correct figure is 400 times, it was sufficient to last until the 1600's.
Placing the sun in the centre of the solar system.
Probably the greatest of the early Greek astronomers was Hipparchus (second century b.c.), best known for his star catalog.
Hipparchus was the best astronomers of his time and was a Greek astronomer, geographer, and mathematician. He very accurately cataloged over 1,000 stars. Ptolemy was a great admirer of Hipparchus research and from what I've seen Ptolemy was often said to do what Hipparchus had done.
Yes
Trigonometry
Hipparchus' famous quote, 'Never deceive a friend' means that you should remain truthful and loyal to your friends. Hipparchus was a Greek mathematician, geographer, and astronomer.
Hipparchus
Hipparchus was best known for star catalog..
Hipparchus was best known for many things. One of them, he invented trigonometry.
Not a lot is known about Hipparchus, including where and how he was educated, and of he went to school.
Hipparchus is best known for his discovery of the precessional movement of the equinoxes. The alterations of the measured positions of the stars resulting from the movement of the points of intersection of the ecliptic and of the celestial equator.
Hipparchus' full name is Hipparchus of Nicaea.
Hipparchus has written: 'The geographical fragments of Hipparchus' -- subject(s): Ancient Geography
The Hipparchus's family is a mysterious family.
Hipparchus was the best astronomers of his time and was a Greek astronomer, geographer, and mathematician. He very accurately cataloged over 1,000 stars. Ptolemy was a great admirer of Hipparchus research and from what I've seen Ptolemy was often said to do what Hipparchus had done.
Yes
single
Trigonometry
hipparchus