98709870987's comments

98709870987 | 13 years ago | on: Gravitational Lensing to Observe Ancient Earth

You are forgetting that we could "travel faster than light" using an Alcubierre Drive [1][2], or something similar. i.e. bending space so that our path is now shorter even though in our local space we are not traveling faster than light.

[1] http://en.wikipedia.org/wiki/Alcubierre_drive

[2] http://techland.time.com/2012/09/19/nasa-actually-working-on...

Granted, it is all theory right now but that is how relativity started. Who knows, maybe in 100 years we'll be traveling to the stars.

Nowhere does causality violation come into the picture. There is more than one way to skin a cat.

98709870987 | 13 years ago | on: Gravitational Lensing to Observe Ancient Earth

>>If we had FTL travel, we could outrace light waves, look back, and see events in the past. The we could race back and report what we saw. That's why it's not possible -- it violates some basic physical ideas about causality.

You are confused. You are not actually traveling to the past therefore causality is not a problem here.

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