The milky way?

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The milky way galaxy contains between 200 and 400 billion stars. Estimate the number of stars in a cluster of 30 galaxies similar in size to the milky way. Your answer should consist of a low esimate and a high esimate, both expressed in scientific notation.

2007-02-28 15:27:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics

3 answers

Wouldn't that just be
200 billion * 30 < total stars of 30 galaxies < 400 billion * 30, or

6*10^12 < total stars of 30 galaxies < 1.2*10^13

2007-02-28 15:49:59 · answer #1 · answered by Moja1981 5 · 0⤊ 1⤋

Just 30 times the high and low estimate for the milky way galaxy.

2007-02-28 15:30:56 · answer #2 · answered by rscanner 6 · 0⤊ 0⤋

a billion = 1E9

Use that and rscanner's answer and you're there.

2007-02-28 15:32:54 · answer #3 · answered by Jerry P 6 · 0⤊ 0⤋