Astronomy
Zhang Heng corrects the Chinese calendar so that it agrees with the seasons. See also 46 bce Astronomy.
Year 123 ce
| Sci & Tech Chronology: In the year 123 ce |
| 5min Related Video: Year 123 ce |
Learn More
Help us answer these
Post a question - any question - to the WikiAnswers community:
Copyrights:
 |
 | Sci & Tech Chronology. History of Science and Technology, edited by Bryan Bunch and Alexander Hellemans. Copyright © 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
