The two most distant galaxies ever known have been discovered by Nasa’s James Webb Space Telescope. Experts say the discovery is not only the earliest-ever galaxy seen in the universe, but is also notable for how big and bright it is. The two galaxies date back to when the cosmos was just 300 million years old. Scientists suggest the revelation could help understand how the universe began. The galaxy, known as JADES-GS-z14-0, appears very bright and is around 1,600 light-years across. It is believed that the galaxy is hundreds of millions of times the mass of our Sun leading experts to questio…