COMETS
What is another nickname for these comets?
"long-tailed pheasant stars"
what year did the Han find out how the moon shines?
202 B.C
What year did the Han Dynasty first discover a solar eclipse?
The year 776 B.C
Who invented the seismograph?
Zhang Heng
What year was the magnetic compass invented?
Roughly between the years 202 BC and 220 AD.
What are one of the nicknames the people gave these comets?
"broom stars"
How did they say the moon shines?
by reflecting the suns light.
How many solar eclipses did the Han Dynasty see in there time period?
The saw 141 solar eclipses
What year was the seismograph made?
What were these compasses originally used for?
When did the people of the Han dynasty discover comets?
202 BC
what did the moon have to act like to reflect the suns light?
A mirror
How did the Han Dynasty discovered solar eclipses?
They figured out when the moon covers the view of the sun it creates a Solar eclipse.
What is the seismograph used for?
Detecting Earthquakes.
What were these originally made of?
Lodestone and wood.
What was the name of the comet the Han wrote about?
Halley's comet
Who worked to find out how the moon shines? (can be at least on)
Jing Fang and Zhang Heng
What is a solar eclipse?
It is when the moon covers the sun and only lets a little light out.
What was the seismograph initially made of?
Bronze
True or false? The compass was originally used for navigation
False