VERY far away and be able to look back at the earth, we would actually see our past? and the more the distance the further we see in the past? true in theory or not?
2007-02-27 08:12:01 · 7 answers · asked by no name 1 in Science & Mathematics ➔ Astronomy & Space
The satellite would see the earth farther into the past the farther away it was placed only from the moment it was turned on. You could not look farther into the past than that moment. So, yes, in theory if the satellite's resolution is good enough to see individual people it would record their past actions. That's the way spy satellites work - by recording the past movement of, for example, enemy troops.
2007-02-27 08:22:03 · answer #1 · answered by Twizard113 5 · 0⤊ 0⤋
Sure, but don't forget the amount of time it will take to get it there. And by huge, you'd be talking about something that would have to be twice as wide as the Earth, just to get it all in. You'd better get a good telescope, because mirror Earth will look twice as far away as the mirror is (and we can only see the roughest details at a mere 100 miles). And your image will be very, very dim. Otherwise, go for it!
2007-02-27 16:23:56 · answer #2 · answered by skepsis 7 · 0⤊ 0⤋
lol no not true at all, not even in theory. The reason we see past in time when looking at distant galaxies is because it takes that long for the light to reach here. If we placed a mirror far away all we would see is the light reflected back at us.
2007-02-27 16:17:33 · answer #3 · answered by Ordin 3 · 0⤊ 1⤋
Theoretically, yeah...but as noted, there's that pesky problem of getting the mirror out there fast enough to see our past. Perhaps we just call up some folks in the Andromeda Galaxy via the ol' hyper-space cellphone and ask them to take a look.
2007-02-27 16:21:43 · answer #4 · answered by Anonymous · 0⤊ 0⤋
True, but once the mirror is placed there it will take time for our telescopes to get the light. Also to get it there you would need to accelerate it faster than the sped of light witch is impossible according to relativity.
http://groups.google.com/group/neat-astronomy?hl=en
2007-02-27 16:18:50 · answer #5 · answered by chase 3 · 0⤊ 0⤋
true but if you wanted to see dinasaurs you would have to instantly put the mirror a few million light years away.
2007-03-03 13:37:03 · answer #6 · answered by Tony N 3 · 0⤊ 0⤋
True in theory. Obviously unworkable in reality.
2007-02-27 17:19:30 · answer #7 · answered by campbelp2002 7 · 0⤊ 0⤋