This Hubble Space Telescope image reveals a massive galaxy cluster, eMACS J1823.1+7822, located nine billion light-years away in the constellation Draco. Gravitational lensing caused by the cluster's mass distorts background galaxies into streaks and arcs of light, offering insights into dark matter
; the galaxy cluster has caused a sufficient curvature of spacetime to bend the path of light and cause background galaxies to appear distorted into streaks and arcs of light. A host of other galaxies can be seen surrounding the cluster, and a handful of foreground stars with tell-tale diffraction spikes are scattered throughout the image.
This particular galaxy cluster is called eMACS J1823.1+7822, and lies almost nine billion light-years away in the constellation Draco. It is one of five exceptionally massive galaxy clusters explored by Hubble in the hopes of measuring the strengths of these gravitational lenses and providing insights into the distribution ofin galaxy clusters. Strong gravitational lenses like eMACS J1823.
This multiwavelength image layers data from eight different filters and two different instruments: Hubble’s Advanced Camera for Surveys and Wide Field Camera 3 . Both instruments have the ability to view astronomical objects in just a small slice of theusing filters, which allow astronomers to image objects at precisely selected wavelengths.
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