I need help!!! PLEASE! Help! ASAP!?

Question

ok i have to do a project and i cannot find out who this guy i have to look up is. his name is cleomedes. i know hes a greek astronomer and stuff but i have to go up to the board and explain what he found out and stuff. everything on google.com or ask.com has WAYYY to many big words and i dont understand them at all

this is the information i got so far:

Cleomedes was a Greek astronomer. He recorded several hypotheses like the earth's rotund form and the moon's revolutions, which were recognized by later scientists.
His birth and death are not positively known. Historians said that he wrote his work sometime between mid 1st century BC and 400 CE. He refers a lot in his writing to the work of Posidonius, a mathematician and astronomer. So, basically, he proved that the Earth was round and that the moon revolves around the Earth.


PLEASE HELP ME! ITS DUE TOMORROW AND I HAVE NO CLUE WHAT THIS GUY DID! PLEASE HELP ME AND PLEASE EXPLAIN IN KID WORDS SO I CAN UNDERSTAND! lol thanks

and dont yell at me and tell me to pay attention in class cuz i get straight A's and she told us to look these people up because she gave each kid a different math matician and she didnt teach us anything on the guy. she wanted us to look it up and i did but i didnt understand it

ok i dont think you ppl understand lol... i looked at EVERYTHING on the website... all of the sites u r giving me, ive seen them. i just want a simple explination because i have NO clue what all those words mean in the sites. please and thank you

Answer 1

Cleomedes was a Greek astronomer who is known mainly for his book "On the Circular Motions of the Celestial Bodies". His birth and death dates are not known--historians have suggested that he wrote his work sometime between the mid-1st Century B.C. and 400 AD.


The book for which Cleomedes is known is a fairly basic astronomy textbook in two volumes. It has been criticized by most modern astronomers as being poorly written--it is valued primarily for preserving, apparently verbatim, much of Posidonius' writings on astronomy (none of Posidonius' books have survived to the modern day). Cleomedes is accurate in some of his remarks on lunar eclipses, especially his conjecture that the shadow on the Moon suggests a spherical Earth. He also states that the size of many stars may exceed that of the Sun.

This book is the original source for the well-known story of how Eratosthenes measured the Earth's circumference. Although the story is now believed by some to be purely legendary, many modern mathematicians and astronomers believe the description to be reasonable (and believe Eratosthenes' achievement to be one of the more impressive accomplishments of ancient astronomy).

Hope this helps.

Answer 2

Is there a math calculation in any of your searches? You didnt say, but it s implied that this is for a math class and since you have to go to the board. Look up his name with the words formula and see what happens. he had to some formula to prove his theory.

good luck

Answer 3

If you don't understand the words, use a dictionary--Webster's should be basic enough. You have the correct spelling, at least --that makes it easier.

Answer 4

See also :

"Cleomedes" : http://en.wikipedia.org/wiki/Cleomedes

"Cleomedes" : http://www-history.mcs.st-andrews.ac.uk/Biographies/Cleomedes.html

"Cleomedes (c. 1st century AD) on the celestial illusion" : http://www.perceptionweb.com/abstract.cgi?id=p2937