A few days ago
mushrik777

help with astronomy calculations?

ok so here is the question on my homework:

If the SUN is at a distance of 1.5 X 108 km…

and its ANGULAR SIZE is 1800”…

then its DIAMETER is ?

This is my answer, 1.31e+5 km

is this right

can any explain it to me?

Top 1 Answers
A few days ago
³√carthagebrujah

Favorite Answer

Your calculation is off by a factor of 10…

Angular size = 1800 arcseconds or .5 degrees

distance = 1.5 * 10^8 km

diameter = distance * angular size in degrees/180π

d = 1.5 * 10^8 * (.5/180π)

d = 1.33 * 10^6 km

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