A giant galaxy cluster, JADES-ID1, formed just 1 billion years after the Big Bang—far earlier than scientists expected. 🌌 With a mass 20 trillion times our Sun and over 66 young galaxies bound by gravity, glowing in X-rays and wrapped in dark matter, this discovery by James Webb and Chandra challenges how fast the universe built its largest structures. 🔭 Image Credit: X-ray: NASA/CXC/CfA/Á. Bogdán; Infrared: NASA/ESA/CSA/STScI; Image Processing: NASA/CXC/SAO/P. Edmonds & L. Frattare. #galaxycl

Galaxy clusters are unimaginably large structures in the universe. | Cosmoknowledge

• Rethinking Cosmology • Universe Expansion May Not Be Uniform 8.4.2020 • A new study using galaxy clusters examines whether the Universe is "isotropic," or the same in all directions. • Galaxy clusters are enormous structures that astronomers can use to measure important cosmological properties. • The latest result uses X-ray data from Chandra and XMM-Newton of hundreds of galaxy clusters. • The cluster observations suggest that the Universe may be different depending on which way astronomers l