Theoretically if I was 66 million light years away from earth and had a telescope strong enough would I be able to see the dinosaurs if I faced it towards earth and nothing was obstructing my view?
In: Physics
To clarify a bit more, photons (light particles) are limited by the speed of light. A light-year is the distance light can travel in a vacuum. We see by light reflecting off of objects and into our eyes. If you were 66 million miles away, only the light that reflected off the Earth 66 million years ago would have had the time to travel across the galaxy and reach you.
That is why, yes, you’d be seeing an image of Earth (and dinosaurs) from 66 million years ago if you were that far away.
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