- #1
SheriffPeabody
- 4
- 0
Hi Everyone,
first post here, another enthusiastic amateur I'm afraid so please excuse my general ignorance!
I struck me the other day that it should be possible to find an arrangement of large galaxies that would allow light emitting from our galaxy to be bent back towards us. This would give us an outside view of our own galaxy once we un-distort the returning light. I've attached a sketch to clarify what I'm talking about.
Would this be theoretically possible? I've been trying to find out, without luck, how much galaxies bend light to estimate how many galaxies you'd need to bend the light through 180°. The fewer and closer the galaxies the better to give us the maximum image size.
While searching for information on this idea, I found a similar idea on another site where someone proposes using a nearby black hole to bend light from Earth through 180° as a way of seeing back in time due to the distance the light has to travel. This is a great idea but seems much less likely considering how close the black how would have to be in order for us to have any chance at resolving an image of Earth through it's gravitational lens. Plus the closer the black hole the closer in time to the present the image would be.
Observing our whole galaxy, even just the shape of it would surely tell us a great deal about where we're from.
I'd love to hear thoughts on this idea from someone who actually knows what they're talking about, rather than ramblings of a hyped up scifi fan like me!
Thanks
P
first post here, another enthusiastic amateur I'm afraid so please excuse my general ignorance!
I struck me the other day that it should be possible to find an arrangement of large galaxies that would allow light emitting from our galaxy to be bent back towards us. This would give us an outside view of our own galaxy once we un-distort the returning light. I've attached a sketch to clarify what I'm talking about.
Would this be theoretically possible? I've been trying to find out, without luck, how much galaxies bend light to estimate how many galaxies you'd need to bend the light through 180°. The fewer and closer the galaxies the better to give us the maximum image size.
While searching for information on this idea, I found a similar idea on another site where someone proposes using a nearby black hole to bend light from Earth through 180° as a way of seeing back in time due to the distance the light has to travel. This is a great idea but seems much less likely considering how close the black how would have to be in order for us to have any chance at resolving an image of Earth through it's gravitational lens. Plus the closer the black hole the closer in time to the present the image would be.
Observing our whole galaxy, even just the shape of it would surely tell us a great deal about where we're from.
I'd love to hear thoughts on this idea from someone who actually knows what they're talking about, rather than ramblings of a hyped up scifi fan like me!
Thanks
P