• Mar 17th 2006, 08:27 AM
forza85
This question has been giving me grief all morning, could anyone help me out:

If the moon's diameter is 3,476 km and its average distance from Earth is 384,000 km, use the small angle formula to calculate the Moon's size in the sky.

angular size / 206,265" = diameter/ distance

• Mar 17th 2006, 08:29 AM
forza85
oh yeah and then:

Convert your answer to the previous question to find the Moon's size in arc-minutes (')

:confused:
• Mar 17th 2006, 08:33 AM
CaptainBlack
Quote:

Originally Posted by forza85
This question has been giving me grief all morning, could anyone help me out:

If the moon's diameter is 3,476 km and its average distance from Earth is 384,000 km, use the small angle formula to calculate the Moon's size in the sky.

angular size / 206,265" = diameter/ distance

angular size=206265*dia/dist=206265*3476/384000~=1867 seconds of arc

RonL
• Mar 17th 2006, 08:35 AM
CaptainBlack
Quote:

Originally Posted by forza85
oh yeah and then:

Convert your answer to the previous question to find the Moon's size in arc-minutes (')