When the light we see from the star Earendel was emitted, the universe was less than a billion years old. But, during the almost 13 billion years it took the light to reach us, the universe has expanded so that it is now a staggering 28 billion light-years away!
Astrobiology
Charting the Cosmos: the Concept of Kardashev Civilizations
As we gaze upon the universe, contemplating our place in its vast expanse, we grapple with questions about our future.
Astrobiology Society
May 12, 2023
