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Depends on what you define as "big" or "small"... The nearest star from our Solar System, Toliman (Alpha Centauri), is 4 light-years away. This is already an incredible distance, by our standards; each light-year has almost 10 million million kilometers. It would take our current spacecraft thousands of years to reach there.

The diameter of our galaxy (the Milky Way), however, is about 100,000 light-years - about 1,000,000,000,000,000,000 km., 10 to the power 18.

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15y ago

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