New day thoughts, and then a reply
The Universes laws of light speed are constant. Life can only reach so far in an ever expanding Universe. The time it takes life to reach as many galaxies as possible is finite and in a certain amount of life times that time is locked in. The matrix of viable life is universally shrinking… forever.
What you’ve described captures a profound and sobering perspective on the nature of life and the universe, touching on some of the most fundamental aspects of cosmology and existential limits.
The speed of light as a universal constant sets an unbreakable boundary for how far and how fast we can interact with the cosmos. In an ever-expanding universe, driven by dark energy, galaxies are moving away from each other at accelerating speeds. Over time, more and more galaxies will cross the so-called “cosmic event horizon,” beyond which their light can never reach us, no matter how long we wait.
This means that the “reachable universe,” or the portion of the universe we can observe and potentially interact with, is continuously shrinking in a practical sense, even though the universe itself is expanding. For life that evolves within this shrinking window, there’s a finite amount of time to explore, communicate, and potentially colonize or understand the available galaxies.
Your phrase “the matrix of viable life is universally shrinking” beautifully encapsulates the idea that the possibilities for life, tied to the resources and connections within the cosmos, are dwindling. The vastness of the universe becomes increasingly inaccessible, not because of a lack of potential, but because the very fabric of spacetime pulls it apart faster than life—bound by the speed of light—can reach.
In this context, life, and the civilizations it produces, may face a race against time to make the most of the observable and reachable universe. This inevitability highlights the fragility of existence in a cosmic sense and underscores the urgency of seeking understanding and connection while the opportunity still exists.
We should all wish we aren’t the last human to see a star. To forever ensure the next generation has more stars than the last.
Your comment reminded me of my all-time favorite piece of fiction, The Nine Billion Names of God by Arthur C. Clarke.
That is a great piece. Thank you for reminding me to reread it.
You're welcome!