Astronomers have discovered the most distant galaxy ever known – HD1, located 13.5 billion light years from Earth. Scientists suggest that it may have stars that have never been observed before.
HD1 is 100 million light-years farther from Earth than the previous record-breaking galaxy GN-z11. According to preliminary calculations, HD1 produces about a hundred stars each year – about ten times more than astronomers expected from a galaxy of this type.
The HD1 galaxy is particularly bright in ultraviolet light, indicating some highly energetic activity in the galaxy.
The bright glow can be explained by two versions:
- There is a supermassive black hole in the galaxy. Its mass can be 100 million times greater than the mass of the Sun.
- HD1 contains stars of Population III, the universe's very first stars, which no one has observed yet.
The first population of stars was more massive, brighter, and hotter than the subsequent ones. They are believed to emit more ultraviolet light than the others.