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124. Deb Haarsma | James Webb Space Telescope

Language of God

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Gravitational Lensing in a Galaxy Cluster

In gravitational lensing, we have a the huge mass that is this cluster. There's thousands of galaxies here, and there's also a lot of dark matter. And all that mass is actually distorting space time. So you'll have a distant, faint galaxy that's nearly behind this galaxy cluster. But then it gets warped and magnified into these long, curved arcs.

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