And what is the volume of the Milky way?
2006-08-30 10:38:37 · 4 answers · asked by goring 6 in Science & Mathematics ➔ Physics
Do the sum: easy in metric
Assume 100,000 light years wide and a flat disk averaging 10,000 light years thick
Plan area = pi x 50,000^2 sq lt years
Call pi 3 for simplicty
Plan area = 3 x 5 x 10^4 x 5 x 10^4 sq light years
= 7.5 x 10^9 sq lt yrs
Multiply by thickness (10000) to get volume
7.5 x 10^ 9 x 10^4 = 7.5 x 10^13 cubic lt years
Want it in cubic metres
1 lt year = 10^13 kms = 10^16 metres
cubic light year = 10^48 cubic metres
Therefore volume of galaxy = 7.5 x 10^13 x 10^48
= 7.5 x 10^61 cubic metres
(could almost do it in my head - I love metric)
2006-08-30 11:27:26 · answer #1 · answered by nick s 6 · 1⤊ 0⤋
10^67 cubic meter
2006-08-30 17:41:30 · answer #2 · answered by happyman 3 · 0⤊ 0⤋
try a website of oxford english dictionary it has a list of masses etc for the solar system.
2006-08-30 17:42:05 · answer #3 · answered by helsfatcatmullen 2 · 0⤊ 1⤋
I dunno but each galazy has a black hole that contains .5% of the galaxy! Always! its like the great recycler or something!
2006-08-30 17:44:16 · answer #4 · answered by the nothing 4 · 0⤊ 0⤋