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How far could the star have travelled in 200 million years? I find it hard to think it could be more than a dozen light years away. And the list of stars within
by meric 9y ago
How far could the star have travelled in 200 million years? I find it hard to think it could be more than a dozen light years away. And the list of stars within, say, 20 light years, is finite.
- simonh 9y agoI think you may be confusing the age of the Sun with the time it takes to complete one galactic orbit. The sun is more than 4 billion years old while 200m years is a bit less than the period for one orbit of the Galaxy (225-250 my). The Sun has completed more than 20 orbits in its lifetime. Even a 0.1% difference in galactic orbital period between the sun and it's twin would put them 3,000 light-years apart by now.