It’s a starquake
Stars experience their own version of earthquakes, called starquakes. These stellar vibrations are movements of gas, making the stars sort of blink, or change their brightness over a time period that varies from seconds to weeks.
Although Gaia was not originally designed to detect starquakes, the observatory discovered more than 100,000 massive, hot blinking stars. These starquakes allow scientists to peer inside the stars, measuring their temperature, density, and rotation.
