For almost 100 years, astronomers have known that the universe is expanding. Galaxies are moving away from us, and the further away a galaxy is, the faster it's receding. This fact led cosmologists to devise the Big Bang theory; if you rewind the current expansion of the universe back in time, eventually you get to a stage where everything was condensed into a single point — the singularity — roughly 13.8 billion years ago.
Because it takes time for light to travel through space, the further away we look, the further back in time we are looking, too. Thanks to the help of the now-operational James Webb Space Telescope (JWST), astronomers are now able to look back farther than ever before.
NASA Discovers 6 Galaxies
Using data from the JWST's infrared instruments, astronomers have spotted what appear to be six massive galaxies from the universe's infancy, according to a study published in Nature in February. These colossal cosmic entities, if confirmed, could reshape how we think about the origins of our universe.
