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Astro-Anouar
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Did The Dark Matter Really exist ? did we have an evidence ? and What is the compositions Of The Dark Matter ?
Astro-Anouar said:Did The Dark Matter Really exist ? did we have an evidence ? and What is the compositions Of The Dark Matter ?
Well, precisely what it is is unknown. We do know a fair amount about it:phinds said:The evidence for its existence is overwhelming, but WHAT it is is unknown.
Chalnoth said:Well, precisely what it is is unknown. We do know a fair amount about it:
1. It's probably made up of particles with some amount of mass.
2. It interacts weakly both with itself and with normal matter. Having interactions comparable to the weak nuclear force, but not the electromagnetic or strong forces, would explain this. It may interact even more weakly, this is unknown.
3. It had to have a low temperature in the early universe. This produces constraints on how they were produced, how strongly they interact, and how massive they are.
4. It has to have been produced in sufficient quantities in the early universe to be about five times the quantity of normal matter (by mass).
It's also worth noting that multiple dark matter search experiments are seeing excesses that have yet to be explained through other means that might be detections of the dark matter particles.
Dark matter is a hypothetical form of matter that is believed to make up approximately 85% of the total matter in the universe. It does not interact with light and therefore cannot be seen or detected through traditional methods.
Scientists have observed the effects of dark matter on the motion of galaxies and galaxy clusters through gravitational lensing and the rotation curves of galaxies. These observations provide strong evidence for the existence of dark matter.
The exact composition of dark matter is still unknown, but it is believed to be made up of non-baryonic particles that do not interact with light. Some of the most popular theories for the composition of dark matter include WIMPs (Weakly Interacting Massive Particles) and axions.
Scientists are using a variety of methods to study dark matter, including astronomical observations, laboratory experiments, and computer simulations. These methods aim to better understand the properties and behavior of dark matter, as well as its role in the formation and evolution of the universe.
Understanding the nature of dark matter is crucial in order to fully understand the structure and evolution of the universe, as well as the fundamental laws of physics. It could also potentially lead to new technologies and advancements in our understanding of the universe.