'There is no conflict between quantum physics and gravity': Physicists sent 20,000 atoms into free fall to prove Einstein's 'happiest thought' - Live Science

Short gamma-ray bursts, or short GRBs, are believed to occur when two compact objects, such as neutron stars, spiral toward one another before colliding and merging. These extraordinarily violent events produce gravitational waves and rank among the most powerful explosions in the Universe. For decades, astronomers have mainly detected these events through their gamma-ray flashes. Their earliest soft X-ray emission has been far more difficult to observe because most narrow-field X-ray telescopes depend on gamma-ray alerts to locate a burst before turning toward it. Einstein Probe's wide-field soft X-ray monitoring has now exposed this previously unseen stage, giving astronomers a direct look at the opening moments of a short GRB.