Random Astronomy Pictures OTD on Nostr: APOD from 2011-10-17 MACS 1206: A #Galaxy Cluster Gravitational Lens A galaxy ...
APOD from 2011-10-17
MACS 1206: A #Galaxy Cluster Gravitational Lens
A galaxy cluster's gravity, acting as a lens, distorts a distant galaxy into an arc, as seen in a Hubble image. This effect, revealing smooth dark matter distribution, helps estimate the cluster's mass and formation time.
HD image at
https://apod.nasa.gov/apod/ap111017.html 
Published at
2024-10-18 07:30:30Event JSON
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