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Something missing from this discussion that's worth pointing out: This image shows profound "gravitational lensing", which you know. But what you might not kno
by bcherry 4y ago
Something missing from this discussion that's worth pointing out:
This image shows profound "gravitational lensing", which you know. But what you might not know is that is precisely _why_ they chose to photograph it.
This galaxy cluster (SMACS 0723) may be the most well known and powerful gravitational lens we have observed. The galaxies shown distorted around the edges are actually behind the lens, but are magnified by it. This means we can see even farther in this region of space than normal, because we compound the power of the JWST with the power of this natural lens.
It all adds up to providing the "deepest" view of the universe yet, allowing us to see galaxies at a distance of more than 13.2B lightyears. This lets us see structures formed in the infancy of the universe, that wouldn't be possible looking at most other points in the sky, or even anywhere else in this deep field besides the perimeter of the lens in the middle.
- t9999999999999 4y agoThe elongated double lensed galaxy to the right of centre shows lots of point sources. These look like globular clusters or maybe satellite galaxies (maybe these are the same thing in the early universe?).
- t9999999999999 4y agoThe two lobes of that elongated lensed galaxy are mirror images of each other (slightly distorted). You can match up the point sources between them.
- supernovae 4y agoThe mind blowing part is that many of those smeared galaxies are the same galaxy just "smeared" around the curvature of space so it shows up in multiple places as we perceive it since its been warped by the gravitational mass/dark matter so strongly.