Galaxies like Andromeda have supermassive black holes at their centers
NASA/JPL-California Institute of Technology
Supermassive black holes appear to be more powerful than theory suggests, blasting the gas surrounding galaxies much farther than expected — a discovery that could help explain several cosmological puzzles, such as the fact that large amounts of gas seem to be lost to space.
Most measurable objects in the universe, such as stars and galaxies, emit light that can be seen from Earth. But it’s often more difficult to measure the cold and diffuse gases that are so important to understanding how the universe works…
