The new SDSS will measure spectra at multiple points in the same galaxy, using a newly created fiber bundle.
The Sloan Foundation Telescope (top left) leads to a close-up of the fiber bundle tip so that each fiber can see a different part of the same galaxy (bottom right).
The image from the Hubble Space Telescope (bottom right) shows one of the first galaxies the new SDSS has measured. Spectra from different parts of ths galaxy (top right) show how how the center of the galaxy differs from its outer regions.
Image Credit:
License: