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Infinite Horizons
2007-Nov-29, 05:12 PM
Having read a few threads on time travel, I was wondering what you would see from distant stars if you looked at earth through a powerful telescope.
For instance.. it takes light seven minutes(approx) to reach the earth from our sun. So viewing the earth from the sun you would see the earth as it was seven minutes.
What would you see viewing the Earth from 100 lightyears away or a thousand?
To avoid the 'any point in space' it must be from a star that may - or may not - have planets around it. Try for ones that have a high % chance of life existing, and work out what they would see.
I have been told there's one where you can see Columbus crossing the ocean.. but can't remember which one!
And how exact could you get.. To the month? the day? the minute? I assume astronomical readings are very precise now for calculating distance.

Infinite Horizons
2007-Nov-29, 05:15 PM
If this should be in the ?s and answers section then please move it by all means.

farmerjumperdon
2007-Nov-29, 05:56 PM
Watch the beginning of Contact. If not exact in detail, the concept is there.

KaiYeves
2007-Nov-29, 09:30 PM
Watch the beginning of Contact. If not exact in detail, the concept is there.
Indeed.
Where I'm from, we only got to see Cosmos last year.