A team of scientists has found the largest superstructure ever reliably characterised in the universe. The discovery was made while mapping the nearby universe using galaxy clusters detected by the ROSAT X-ray satellite's survey of the sky. With a length of about 1.4 billion lightyears, the new structure, which consists mainly of dark matter, is the largest known structure to date. Researchers at the Max Planck Institute for Extraterrestrial Physics (MPE) and the Max Planck Institute for Physics (MPP) led the study in collaboration with colleagues in Spain and South Africa.
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