The X-Ray Imaging and Spectroscopy Mission (XRISM) has revealed an unexpected difference between the powerful winds launching ...

Astronomers have doubled the number of black hole and neutron star mergers detected via gravitational waves in a "stellar ...

On February 25, 2024, XRISM used its Resolve instrument to observe the neutron star GX13+1, which is the core of a once larger star that has burned out. GX13+1 is a bright X-ray source. These X-rays ...

XRISM found dense winds from a neutron star disc differ from those around black holes, challenging ideas on how such winds form and shape their environment.

Gravitational-wave astronomy has exploded since 2015, capturing hundreds of black hole and neutron star collisions. With ever ...

Binary star systems are not rare. Neither are systems where one star is a remnant like a white dwarf or neutron star, and its companion is on the main sequence. In those systems, the dense remnant can ...

Complete transmittance curves were created for the instrument’s three filters and will serve to calibrate the mission’s ...

A decade after the first discovery, scientists have used these waves to find a unique merger, a massive binary system and a ...

In a significant breakthrough, astronomers have recently discovered a “ghost star” nestled within the remnants of a supernova ...

Back in 1971, the late physicist Stephen Hawking made an intriguing prediction: The total surface area of a black hole cannot decrease, only increase or remain stable. So if two black holes combine, ...