00:00The James Webb Space Telescope has given us some absolutely jaw-dropping images of deep
00:08space so far.
00:10From eerie spiral galaxies, to the furthest looks back in time to when the universe was
00:14still in its infancy.
00:15Now NASA's newest space telescope is making discoveries, and it has just identified the
00:20four furthest galaxies ever observed.
00:22They don't look like much, just little specks in a sea of black, and, well, other little
00:26specks.
00:27The oldest of these galaxies is believed to have formed just 320 million years after the
00:32Big Bang.
00:33That means they were formed around 13 billion years ago.
00:36That period of time is called the Epoch of Reionization, an excitatory time in the universe's
00:40history when the first stars were emerging into being, and that might be why all four
00:44of them are rather small galaxies.
00:46None of the galaxies weighs more than 100 million solar masses, which one of the researchers
00:50says for reference, the Milky Way weighs 1.5 trillion solar masses, and they likely have
00:56very low metal content as well.
00:58That's because the closer in time a galaxy is to having been formed after the Big Bang,
01:01the lower its metal composition tends to be, as metal forms in stars, and there were simply
01:06fewer of them.
Comments