Image: Red supergiant DFK 52 and its surrounding region captured by ALMA. The immense bubble of gas and dust created by this star stretches roughly 1.4 light years across—thousands of times larger than the Solar System. ALMA detects millimetre-wavelength light, invisible to the human eye, emitted by elements such as carbon monoxide and silicon monoxide. By using the Doppler effect, scientists determined how quickly the gas is moving in relation to the star. In the image, red areas represent