How close is too close to a kilonova?

Cataclysmic events happen in the universe all the time. Black hole mergers, supernovae, gamma-ray bursts, and a whole host of others. Most of them happen in distant galaxies, so they pose no threat to us. But there are a ...

First scientific results from Galaxy Cruise

Galaxy Cruise, a citizen science project led by the National Astronomical Observatory of Japan (NAOJ), has been sailing the cosmic ocean with citizen astronomers to uncover the secrets of galaxies since 2019.

Unprecedented gamma-ray burst explained by long-lived jet

Last year, Northwestern University researchers reported new observational evidence that long gamma-ray bursts (GRBs) can result from the merger of a neutron star with another compact object (either another neutron star or ...

Disks, spikes and clouds: A peek into a black hole's back yard

The first direct detection of gravitational waves in 2015 has opened a new window on the universe, enabling in particular the observation of the merger of pairs of massive black holes. This young field of research has matured ...

When black holes collide they also produce neutrinos

Ever since astronomers first detected ultra high energy neutrinos coming from random directions in space, they have not been able to figure out what generates them. But a new hypothesis suggests an unlikely source: the mergers ...

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