Astronomers have captured an unprecedented view of the Milky Way galaxy’s heart, unveiling the complex, star-forming gases swirling around its supermassive black hole.
The new image, released by the European Southern Observatory (ESO), focuses on the Central Molecular Zone (CMZ), a region spanning more than 650 light-years across. Observed using the ALMA telescope network in Chile’s Atacama Desert, the image provides the most detailed view yet of the dense clouds of gas and dust that fuel star formation.
“This is a place of extremes, invisible to our eyes, but now revealed in extraordinary detail,” said Ashley Barnes of ESO, a member of the research team. By mapping the distribution of molecules such as sulphur monoxide, silicon monoxide, isocyanic acid, cyanoacetylene, and carbon monosulphide, astronomers can track how stars and planets emerge in these extreme environments.
Steve Longmore of Liverpool John Moores University, who leads the ALMA CMZ Exploration Survey, emphasized that understanding the CMZ sheds light on the broader evolution of galaxies. “By studying star formation in this dense and chaotic region, we gain insight into the processes shaping galaxies across the universe,” Longmore said.
The ALMA array, located in one of Earth’s driest deserts, is uniquely equipped to detect faint radio signals emitted by cold molecular clouds. In this survey, infrared observations of foreground stars complement the molecular data, producing a colorful and scientifically rich composite that reveals the galaxy’s hidden structure.
The findings offer a striking reminder of the Milky Way’s dynamic and intricate heart—an environment that, while invisible to the naked eye, plays a critical role in cosmic evolution.