There are 300 million in the Milky Way galaxy that we live in. It is one of 125 billion galaxies in the universe. As our galaxy is only a little over average in size, this means that our star is one of 30 million million stars in the universe. A fantastically large number. This is where the line "There are as many stars as their are grains of sand on every beach in the world" comes...
From Yahoo Answers
Roughly 400,000,000,000 (400 billion). We do not currently possess the ability or technology to figure out anything close to an exact figure, however NASA has been able to give us a rough estimate. It is as follows: "For example, because of NASA, we can calculate roughly how many trees we have on Earth. Trees, both leafy and otherwise, reflect sunshine in very particular patterns,...Full answer
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