The Edge of a Spiral
ESA / Hubble & NASA, R. Windhorst, W. Keel
Day 22 of the 2024 Space Telescope Advent Calendar: the edge of a spiral. Located roughly 150 million light-years from Earth in the constellation Serpens, UGC 10043 is one of the somewhat rare spiral galaxies that are seen edge-on. From this point of view, we see the galaxy’s disk as a sharp line through space, overlaid with a prominent dust lane. One can see the lights of some active star-forming regions in the arms, shining out from behind the dust.
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