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Tiny
2004-Jan-24, 01:58 AM
>< again astronomy class question.

The sun has roughly the same angular size in earth&#39;s sky as the moon, but its diameter is roughly 400 times larger than the moon. Use this to estimate how many times further away the sun is than the moon.

Sorry to trouble u guyz again?
I already know that the angular size of the moon/sun is 0.5 and the diameter for the moon is 3345 km (actually is about 3500km, but the teacher change the distance alittle bit) and the distance from the Moon to the sun is 149 million km... so how many times further away the sun is than the moon?

damienpaul
2004-Jan-24, 02:18 AM
No trouble at all, Tiny

Here is a few websites that I found that may be able to help:

http://www.mreclipse.com/Special/SEprimer.html

http://sunearth.gsfc.nasa.gov/eclipse/SEhe...SEgeometry.html (http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/SEgeometry.html) - this is a good one

I think it is a ratio of:

sun size:moon size = sun distance:moon distance

I sincerely hope this helps

Tiny
2004-Jan-24, 02:31 AM
:lol: thanks for the site, now i know its 400 times larger than the Moon and its almost 400 times farther away from the Sun as well... but I need to show work in order to get credit ><

Tiny
2004-Jan-24, 02:59 AM
>< never mind I finally got it >< Topic close

DippyHippy
2004-Jan-24, 06:03 AM