science π Milky Way merged with another galaxy early on
Astronomers found evidence that the Milky Way merged with another galaxy shortly after the Big Bang. This discovery was made using the Hubble Space Telescope while studying 39 globular clusters in our galaxy. The clusters originated from a galaxy named Low-energy-Kraken-Heracles, which had a stellar mass of about 500 million times that of the Sun. Scientists believe this significant merger took place around 12.3 billion years ago. This finding adds to the known history of galaxy mergers, such as the one with Gaia-Sausage-Enceladus 10 billion years ago.