What Is Dark Energy? The Mysterious Force Expanding Our Universe

追加: 2026-05-19

[00:00:00]Imagine a force that pushes galaxies apart. It is invisible and mysterious.

[00:00:03][music] This is dark energy. Welcome back to Cosmic Earth. Today we dive into the greatest mystery of our universe. Let's uncover the truth about dark energy.

[00:00:12][music] Dark energy is not a thing you can touch. It is a property of space itself. It fills the entire cosmos.

[00:00:18]Astronomers found that galaxies are moving away. They are not just [music] moving. They are accelerating. Many people confuse it with dark matter, but they are totally different. Dark matter pulls things together. Dark energy does the opposite. It pushes everything apart. It acts like an anti-gravity force. [music] Scientists estimate its size. It makes up 68% of the universe.

[00:00:38]That is a huge amount. One theory is vacuum energy. Space is not truly empty.

[00:00:43]It has energy even in a vacuum. This energy creates pressure. It forces space to expand [music] faster. This happens everywhere we look. How do we know it exists? We look at distant supernova.

[00:00:52]They are dimmer than expected. It shapes [music] the cosmic web. This is the structure of the universe. It connects all galaxies. Einstein called it a mistake. He added a constant to his equations. Now it [music] explains dark energy. What is the final fate? The universe will keep expanding. Everything will drift apart. This is why it matters. It defines our existence.

[00:01:10][music] It shapes our entire reality.

[00:01:13]Dark energy is a mystery. It is the dominant force. We are still learning.

[00:01:17]This is the story of dark energy. If you learned something new, please like.

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