Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: andreiperi on 01/02/2012 14:32:19

Title: Will our own sunlight return to Earth one day?
Post by: andreiperi on 01/02/2012 14:32:19

can we be looking at our own Sun (or earth for that matter) while watching the night sky ?
Can light which has looped back to us after travelling through space for many light years, reveal to us  our own distant past through a powerful telescope ?

Title: Re: sun light loopback
Post by: syhprum on 01/02/2012 14:55:32

No even if space was curved in such a manner that light travelled a complete circuit around the universe the time delay would be such that we would be seeing our local area long before the solar system came into being.

Title: Re: sun light loopback
Post by: andreiperi on 01/02/2012 17:48:51

Good thinking concerning the curveture of the universe.
What if there was such an arrangement of stars in our galaxy as to cause the light to curve back to us ?