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Telescope Technology

One of the few galaxies with a well-studied stellar halo is our neighbor, Andromeda, depicted here in the graphic. The reason Andromeda’s halo can be investigated so thoroughly is simply a matter of distance, both being close enough and bright enough that we can see the full picture with our current class of telescopes.

NASA’s Roman Space Telescope Set to Unveil Galactic History and Dark Matter Secrets

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