Jonathan O’Callaghan

Jonathan O’Callaghan Guest author

Award-winning British freelance space journalist based in Bangkok, covering astronomy, astrophysics, commercial spaceflight and space exploration for major international outlets including The New York Times, BBC, Scientific American, Quanta, New Scientist and Wired. Voted British Science Journalist of the Year in 2024 and recipient of the AGU’s Walter Sullivan Award for feature writing (2021), they also contribute to children’s non-fiction books and regularly appear on TV and radio as a space expert.

Scientists hunt dark matter ‘stars’ that mimic black holes
Artist’s rendition of two dark matter stars, or bosons, colliding in deep space. © Nicolás Sanchis-Gual y Rocío García Souto, University of Valencia, Spain, 2021

Europe

Scientists hunt dark matter ‘stars’ that mimic black holes

By Jonathan O’Callaghan - This article was originally published in Horizon the EU Research and Innovation Magazine. In 2019, a strange event was observed in the depths of space. Called GW190521, the event…

12 February 2026 · 6 min read