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What Is the “Dark Energy” That Scientists Seek to Measure and Define?

October 31, 2018 1 Comment

In 1929, Edwin Hubble discovered that the universe was not static but was in fact expanding outward from some point of singularity. At first his fellow scientists ridiculed his theory, labeling it with the term “the big bang.” Even as late as the 1960s I remember being taught in school that the universe was eternal and fixed. That “settled science” has since given way to the current view that the universe is expanding outward—quite rapidly, in fact.

There is more, however: a mysterious factor called “dark energy” complicates things. If we think of the analogy of an exploding Fourth of July firework, we observe that its rapid outward expansion decelerates as the force of gravity slows and then finally halts its outward motion. Similarly, as our universe expands outward we would expect to see some slowing in the rate of its outward expansion as stars and galaxies exert their gravitational forces. However, measurements indicate that expansion is not slowing down; it’s speeding up. Many scientists attribute this to “dark energy.” It is called “dark” because it is poorly understood. Its effects can be observed, but what “it” is remains a “dark” or mysterious reality.

Hmm, the universe is speeding up as it expands. This is rather counterintuitive!

So, what is this dark energy that causes the universe to expand ever more rapidly?

I would like to propose an answer not from the physical sciences but from the realm of theology, speculative theology at that. As such, my answer does not dwell on material or efficient causality but rather on formal and final causality. (Material causality focuses on what is changed; efficient causality focuses on the way something is changed. Formal causality focuses on the active agent that causes the change; final causality focuses on the reason that this agent of change acts.)

The answer is love. God, who is love, created all things in love by the powerful effect of His love and Word diffusing outward. Love does not diminish but intensifies and multiplies as it is shared. Love is effusive of itself. It seeks to share and multiply. Adam and Eve are told to be fruitful and multiply in marital love. Yes, love expands and intensifies if it is offered and received generously.

In a finite world, we tend to think of everything in it as part of a zero-sum game. So, if I take something, there is less of it for you. Love is not that way. Hugs multiply when shared. A small act of kindness can have great effect, far beyond its initial limited scope. Knowledge is this way, too. We think that if we learn one thing, then the number of things to learn decreases; in fact, the questions simply multiply and grow more urgent.

As a picture of love, consider the Easter Vigil. From one small flame atop the Easter candle every other candle held by the faithful in the church is lit and shared, and yet the flame of the Easter candle is in no way diminished or dimmed. It is “a flame divided but undimmed.” As that light goes outward, the church brightens more rapidly as the light is shared by more and more people in the congregation. Yes, the speed at which the light (Christ) goes out increases as it is shared by more and more. This is a small picture of our universe.

This is why the universe expands more rapidly as it goes outward: Love, God’s love!

Please understand the humility and lightheartedness with which I offer this explanation. I speak as a “theologian” and look to formal and final causalities. I am under no illusion that the physical sciences can accept my answer; they deal primarily in material and efficient causality and must stay within those limits and work with those premises. Theology, however, based on revelation, can enter into formal and final causality.

To you who believe I have this message: Do not ever forget that everything you see in the abundance of the universe and in its astonishing size and speed is rooted in a creative act of love by God, who is love. You are not simply walking around in a machine; you are walking about in an act of love that is sustained by love.

Yes, love, that is the answer!

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  1. Ed Lee says:

    “By faith we understand that entire universe was formed at God’s command, that what we now see did not come from anything that can be seen.” Hebrews 11:3

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