Hubble’s latest portrait zooms into Abell 209, a colossal galaxy cluster 2.8 billion light-years away whose gravity bends spacetime itself. Beyond the glittering hundred-plus galaxies lies an invisible stew of X-ray-hot gas and dark matter that outweighs normal matter five to one. Subtle streaks from gravitational lensing reveal how astronomers map this hidden mass, providing […]



Summary

Hubble’s new image of Abell 209, a massive galaxy cluster 2.8 billion light-years distant, showcases its immense gravitational power. This cluster contains over a hundred galaxies and a significant amount of X-ray-hot gas and dark matter, outweighing regular matter by five to one. Astronomers utilize gravitational lensing, observable as subtle streaks in the image, to map the distribution of this otherwise invisible dark matter, revealing its influence on spacetime. The image provides valuable insights into the composition and structure of this distant cosmic giant.

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