what is dark matter ,why there is more dark matter than object in space?

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Dark matter is a mysterious and hypothetical form of matter that does not emit, absorb, or interact with electromagnetic radiation, including light. It is called "dark" because it doesn't give off or interact with any detectable electromagnetic radiation, making it essentially invisible to conventional telescopes and other instruments that rely on detecting light or other forms of electromagnetic waves. Here are some key characteristics and facts about dark matter: 1. **Invisible and Undetectable**: Dark matter does not interact with electromagnetic forces, such as electromagnetism or the electromagnetic spectrum (which includes visible light, radio waves, X-rays, etc.). Therefore, it cannot be observed directly through electromagnetic radiation. 2. **Gravitational Effects**: The existence of dark matter is inferred from its gravitational effects on visible matter, such as stars, galaxies, and galaxy clusters. It exerts a gravitational pull on these objects, and its presence is necessary to explain the observed motions and structures in the universe. 3. **Abundance**: Current cosmological models suggest that dark matter makes up a significant portion of the total mass in the universe, accounting for approximately 27% of the universe's total mass-energy content. The rest is primarily composed of dark energy (about 68%) and visible matter (stars, galaxies, planets, etc., about 5%). 4. **Nature of Dark Matter**: The nature of dark matter remains one of the most significant mysteries in astrophysics and cosmology. Various candidates have been proposed, including Weakly Interacting Massive Particles (WIMPs), Axions, and other hypothetical particles. However, none of these candidates have been definitively confirmed through direct observation. 5. **Cosmic Structure**: Dark matter plays a crucial role in the formation and evolution of cosmic structures, such as galaxies and galaxy clusters. Its gravitational influence helps galaxies maintain their shape and holds galaxy clusters together. 6. **Searches for Dark Matter**: Scientists have been conducting experiments and observations to detect and study dark matter indirectly. These experiments include those conducted in underground laboratories, particle colliders, and space-based observatories. While some tantalizing hints have emerged, dark matter remains elusive. Understanding the nature of dark matter is a fundamental challenge in astrophysics and particle physics. It is one of the key mysteries of the universe, and solving this mystery could provide profound insights into the nature of the cosmos and the fundamental laws of physics. However, as of my last knowledge update in September 2021, dark matter's true nature and composition remain unresolved questions in the field of science. Researchers continue their efforts to detect and characterize dark matter through various means.

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It's a common misconception that there is more dark matter in the universe than light or visible matter. In fact, the opposite is true. The universe is predominantly composed of ordinary matter, also known as baryonic matter, which includes atoms and particles that make up stars, galaxies, planets, and everything we can see with telescopes. Dark matter, on the other hand, is a mysterious and invisible form of matter that doesn't interact with light or other forms of electromagnetic radiation. It's called "dark" because it doesn't emit, absorb, or reflect light, making it essentially invisible. Dark matter makes up a larger portion of the total mass in the universe, but not the total matter. The current understanding of the composition of the universe is roughly as follows: Dark Energy: This is believed to make up the majority of the universe's content (about 68%). Dark energy is a mysterious force that is causing the universe's expansion to accelerate. Dark Matter: Dark matter makes up around 27% of the universe's content. It exerts a gravitational influence on galaxies and galaxy clusters, helping to hold them together and explaining the observed motions of stars and galaxies. Visible or Baryonic Matter: This is the ordinary matter we can see and interact with. It makes up only about 5% of the universe's content. This matter includes stars, planets, interstellar gas, and dust. So, the universe is mostly composed of dark energy and dark matter, but in terms of the matter that we can directly observe and interact with (visible or baryonic matter), it is a small fraction of the total matter in the universe. This is why we refer to it as "dark" matter and "dark" energy—it's not because they are actually darker in color but because they are invisible and do not interact with light in the way that visible matter does.Dark matter and light (in the context of visible light) are two very different things, and they exist in space for different reasons: 1. **Dark Matter**: Dark matter is a theoretical form of matter that does not emit, absorb, or interact with electromagnetic radiation, including visible light. It's called "dark" because it doesn't give off any detectable light. The existence of dark matter is inferred from its gravitational effects on visible matter, such as stars and galaxies. It's believed to make up a significant portion of the mass in the universe, about 27% according to current estimates. Dark matter is necessary to explain the observed motions of galaxies and the large-scale structure of the universe. Its presence is inferred because the gravitational forces exerted by visible matter alone wouldn't be sufficient to account for the observed motions and structures. 2. **Light**: Light, on the other hand, is a form of electromagnetic radiation that we can detect with our eyes. It's produced by various processes in space, including the fusion of hydrogen into helium in stars, as well as by other sources like galaxies, nebulae, and quasars. This visible light is just one small portion of the entire electromagnetic spectrum, which includes radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays. Light from stars and other celestial objects travels through space and can be observed by telescopes when it reaches us on Earth or in space observatories. In summary, dark matter and light serve different roles in our understanding of the universe. Dark matter is a hypothetical form of matter that is invisible and doesn't emit light, while light is the visible portion of the electromagnetic spectrum emitted by various astronomical objects. The reason dark matter is more prevalent than visible light in space is that it's believed to be a major component of the mass in the universe and plays a crucial role in the gravitational dynamics of galaxies and the cosmos as a whole, even though it doesn't emit any detectable light.