Well then they are all too small because they all appear the same.
You name it. We get good close ups of our Sun, no? At what distance is resolution lost?
I"m surprised not to see mention of the recent Cornell paper:
https://arxiv.org/abs/1803.08930
If there is a backward time universe behind ours, perhaps that would lead to the perception that our universe is expanding from a point. If time slows down, then reverses on the other side, would that make our side appear to shrink as it approaches the join between the forward and backward universes? Making it look like an expansion from a big bang?
https://arxiv.org/abs/1803.08930
If there is a backward time universe behind ours, perhaps that would lead to the perception that our universe is expanding from a point. If time slows down, then reverses on the other side, would that make our side appear to shrink as it approaches the join between the forward and backward universes? Making it look like an expansion from a big bang?
There has been some hypothesis that on the other side of the singularity that our universe arose from, there was another universe that collapsed on itself until it was near infinitely dense and small, and that then ‘fell through’ to create our universe - sort of like those old fashioned hour glass timers. If this is indeed the case, that universe would have been closed, and not open ended as ours is now thought to be.
I might just look like a begining to us, if time slows to a stop and reverses at that "place."
James Webb is not going to take close up images of distant galaxies. Instead it takes in an incredibly 'deep field' at infrared wavelengths, imaging galaxies that are much more distant, hence further back in time, that the ones we can see courtesy of visible light. You can see some of these distant galaxies scattered across the background in the Webb star image.
In fact, a lot of the scientific work undertaken by the Webb will not involve taking images in the way that you think of them, but instead will involve spectroscopic analysis of the light from the nearby universe e.g. studying the light of stars within our own galaxy that have exoplanets passing in front of them.
What I've just told you is possible!
In terms of angular resolution, or sharpness of the images, the JWST can see at a resolution of 0.1 arc-seconds, which means that it could resolve a penny 24 miles away or a football 340 miles away.
In terms of angular resolution, or sharpness of the images, the JWST can see at a resolution of 0.1 arc-seconds, which means that it could resolve a penny 24 miles away or a football 340 miles away.
Okay, very impressive. Those are terms I can relate to. However, on the cosmic scale, how close does a star have to be to have similar resolution? Our Sun?
I can't answer that impenetrable question any better than I can tell you how existence began! 😉
I didn't. At least not in any sense that we understand it. It's going in both directions at once. the intersection of opposite directions is what we perceive as a beginning.
- Status
- Not open for further replies.