A new study led by University of Arizona astronomers finds that supermassive black holes may slow star formation not only in their own, but nearby galaxies as well. The findings suggest that black holes may have played a much larger role in shaping the growth of galaxies in the early universe than previously thought.

Space weather can disrupt satellite navigation and communication systems by triggering rapid fluctuations in the ionosphere.

In a must-see topical lecture called “From Discovery to Impact: A Framework for Research That Strengthens Communities,” Morton draws on Arizona State University’s pioneering model of use-inspired research — where excellence is measured by the overall economic, social, cultural, and overall health of the communities ASU serves.

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how planets form.

On 2 July, 2025, the China-led Einstein Probe (EP) space telescope detected an exceptionally bright X-ray source whose brightness varied rapidly during a routine sky survey. Its unusual signal immediately set it apart from ordinary cosmic sources, triggering rapid follow-up observations by telescopes worldwide.

This research was coordinated by the EP Science Center of the National Astronomical Observatories, Chinese Academy of Sciences (NAOC), with participation from multiple research institutions in China and abroad. Astrophysicists from the Department of Physics at The University of Hong Kong (HKU), who are integral members of the EP scientific team, worked together with the broader collaboration to interpret the event, proposing that it may mark the moment when an intermediate-mass black hole tears apart and consumes a white dwarf star. If confirmed, this would be the first observational evidence of such an extreme black hole “feeding” process. The findings have been published as a cover article in Science Bulletin.

Photonics is promising to handle extensive vector multiplications in AI applications. Scientists in China have promoted a programmable and reconfigurable photonic linear vector machine named SUANPAN, with extreme scalability formed by a series of emitter-detector pairs as the independent basic computing units and implemented through time-space encoding. Such SUANPAN has successfully solved 1024-dimensional optimization problem and handwritten digit images recognition. It is believed that SUANPAN is potential to enhance the computing power for AI applications.

Scientists used the European Space Agency's Cheops satellite to discover that the planetary system around the star LHS 1903 challenges current planet formation theories with the unusual order of its planets. Surprisingly, the most distant outer planet might be rocky and seems to have formed later – in a different environment than the other planets around the star.