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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....

Researchers have used a "gravitational lens" to reveal distant galaxies. The snapshot could help astronomers better understand dark matter.

A new image of the massive El Gordo galaxy cluster, taken by NASA's James Webb Space Telescope, shows 62 distorted galaxies behind the cluster.

The winners of the Comedy Wildlife Photography Awards. This Christmas, give the gift of welding classes. How to gift wrap a dog. “The 60 Most Beautiful Books of 2022.” An exhibition called “Building the Book from the Ancient World to the Present Day.” Find out if it’s Wednesday. Seeing red in an image that has no red pixels. Artist and activist Stuart Semple rebels against the color of the year. Graphene-enhanced power sources for flexible electronic devices. What the “fusion experiment” at the National Ignition Facility actually accomplished. Police break into an art gallery to ...