What is The Universe Made Of ?

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The composition of the universe is often described in terms of its energy and matter content. According to the most widely accepted cosmological model, the Lambda-CDM model (Lambda Cold Dark Matter), the universe is primarily composed of the following components:

1. Dark Energy (about 68%):

2. Dark energy is a mysterious force causing the accelerated expansion of the universe. It is associated with a cosmological constant (often denoted by Lambda) in the equations of general relativity.

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4. Dark Matter (about 27%):

5. Dark matter is an unseen and as-yet-undetected form of matter that does not emit, absorb, or reflect light. Its existence is inferred from its gravitational effects on visible matter, such as galaxies and galaxy clusters.

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7. Baryonic Matter (about 5%):

8. This is the ordinary matter made up of protons, neutrons, and electrons—the stuff we can see and interact with. Baryonic matter includes stars, planets, galaxies, intergalactic gas, and all observable matter in the universe.

It's important to note that the term "dark" in dark energy and dark matter does not imply malevolence but rather refers to our current inability to directly observe or detect these components with electromagnetic radiation.

The Lambda-CDM model has been successful in explaining a wide range of observations, including the large-scale structure of the universe, the cosmic microwave background radiation, and the distribution of galaxies. However, there are still many open questions in cosmology, and ongoing research and observations may refine or expand our understanding of the universe's composition.

Read More: How Science as Progressed in The World ?