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Name: Che-Bin
Status: other
Grade: other
Location: CA
Country: N/A
Date: 1/29/2005


Question:
My son asked me: how many stars can we see on the sky with our human eyes?


Replies:
This is not easy to estimate accurately because of the many factors that enter in. A short list:

1. How good is your vision?

2. No moon, half moon, full moon?

3. Clear still atmosphere, or haze?

4. Light pollution from city lights?

5. Observer's location (longitude/latitude)?

6. Time of night?

Taken all together the number is probably greater than 4000 but less than 10,000 but that is only a rough estimate.

Vince Calder



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