A. Da Silva

In Euclid's deep fields, stars flare up that were not in any catalog. A telescope built to map dark matter has worked like a camera trap: one frame, and a cosmic explosion is already on record.

Standard cosmology relies on the Big Bang and dark energy, but there is an alternative — the Lemaître–Tolman–Bondi model, where the Universe's expansion is explained not by a mysterious force, but by natural unevenness in the distribution of matter — clusters of…