 |
|
|
Introductory Topics
|
|
|
 |
Astronomical Time and Atomic Time |
|
|
Astronomical Photo Album on the Web |
|
|
24 Solar Terms - An introduction |
|
|
History of Hong Kong Time Service |
|
|
International Time Zones |
|
|
Beginning of the 21st Century |
|
|
What is "Solar Eclipse"? |
|
|
What is "Lunar Eclipse"? |
|
|
What is a Comet? |
|
|
What are "Meteor" and "Meteor Shower"? |
|
|
The Mars Hoax |
|
|
Advanced Topics
|
|
|
|
|
Basic Terms in Time Service |
|
|
The Chinese Agricultural Calendar Explained |
|
|
Apparent motion of planets Explained |
|
|
What is "Opposition of Jupiter"? |
|
|
What is "Parade of the Five Planets"? |
|
|
What is "Twilight"? |
|
|