BrotherBrutha t1_j25jele wrote
Reply to comment by The-Temple-Of-Iron in If the Big Bang was the end of a previous universe, then could a strong enough telescope see into the previous universe? by [deleted]
Just to be needlessly pedantic (because I’m bored!), from what I understand photons couldn’t start travelling through the universe until about 400,000 years or so after the Big Bang (maybe a bit less, depends what you read!), since it was opaque until then.
So, the CMB from that time is as far back as we can get with a telescope.
The-Temple-Of-Iron t1_j25jokq wrote
My bad. I stand corrected. I got the "earliest we know for sure" and "earliest we can see mixed up. Thank you!
RobotNoisesBeepBoop t1_j25t6t7 wrote
We might be able to use sensitive enough neutrino detectors or gravitational wave detectors to see further back than the CMB though I believe. Just not “light” detecting telescopes. I mean. We are nowhere near that right now and may never be. But it’s theoretically possible.
The-Temple-Of-Iron t1_j25wfb0 wrote
Sounds interesting. That would be very cool.
[deleted] OP t1_j27zrq7 wrote
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