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Observationally, kilonovae are astrophysical transients powered by the radioactive decay of nuclei heavier than iron, thought to be synthesized in the merger of two compact objects1–4. Over the first few days, the kilonova evolution is dominated by a large number of radioactive isotopes contributing to the heating rate2,5. On timescales of weeks to months, its behaviour is predicted to differ depending on the ejecta composition and the merger remnant6–8. Previous work has shown that the kilonova associated with gamma-ray burst 230307A is similar to kilonova AT2017gfo (ref....

The discovery of a dwarf galaxy, named PEARLSDG, by a team of astronomers led by Tim Carleton from Arizona State University, challenges our understanding of galaxy evolution....

This isolated dwarf galaxy hasn't formed a new star in over one billion years. But it has no interacting neighbours. What quenched it?

Astronomers working with the JWST found a dwarf galaxy they weren't looking for.

Dwarf galaxy PEARLSDG was found by scientists using NASA's James Webb Space Telescope. However, its existence goes against established knowledge of galaxy formation.