Fig. 1

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Left: nuclear cluster of the Milky Way at 2.15 μm seen with VIRCAM/VISTA. Right: the same field at 4.5 μm, seen with Spitzer/IRAC. Galactic north is up and Galactic east is to the left, so that the Galactic plane runs horizontally across the middle of the images. Offsets are given in parsec relative to Sgr A*. The colour scale is logarithmic and both images have been scaled in an identical way.

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