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Visible in the image are, from the center, a bright nucleus, a bright central bar, a prominent ring of dark dust, blue clusters

Hubble Sees Anemic Spiral NGC 4921

How far away is spiral galaxy NGC 4921? Although presently estimated to be about 310 million light years distant, a more precise determination could be coupled with its known recession speed to help humanity better calibrate the expansion rate of the entire visible universe.

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