# Unveiling the Invisible Universe: The Role of Dark Matter
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Chapter 1: The Mystery of Dark Matter
Dark matter stands as one of physics' greatest enigmas. Imagine there are unseen threads weaving through the cosmos, binding galaxies and galaxy clusters together. These hidden forces ensure that our Milky Way remains intact; without them, it would drift apart into the void. This unseen influence is what scientists refer to as dark matter.
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Everything we perceive — including you, your pets, the Earth, the moon, the sun, the Milky Way, and every other galaxy — is composed of "normal" matter. This familiar matter is made up of fundamental particles such as electrons and protons, which combine to create atoms. Yet, there exists a form of matter and energy that eludes our sight. Dubbed dark matter, it does not interact with light in any way, rendering it invisible — hence the term "dark."
So, how can we confirm its existence if it remains unseen? Our understanding comes from observing its impact on visible matter. Picture galaxies as spinning rides; the stars and planets must cling tightly, or they risk being ejected into the vastness of space. Gravity plays a crucial role in keeping them together, yet our measurements indicate insufficient visible mass to produce the necessary gravitational force for holding galaxies intact. This implies that something else is at work — and that’s the function of dark matter.
Chapter 2: The Composition of Our Universe
Current scientific estimates suggest that dark matter constitutes about 26% of the universe, while ordinary matter makes up a mere 5%. The remaining 70% is attributed to an enigmatic force known as dark energy.
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I look forward to our next exploration!
The first video, What If We Could See the Invisible Universe?, delves into the intriguing concept of dark matter and its implications for our understanding of the cosmos.
The second video, The Invisible Universe that Surrounds Us with Dr. Dave Pooley, features expert insights into the unseen forces shaping our universe.