What is Dark Matter and Dark Energy?

AI Thread Summary
Dark matter and dark energy are distinct concepts in astrophysics, with no known relationship despite sharing the term "dark." Current scientific understanding does not provide definitive answers about their nature, and discussions often focus on their properties rather than their identities. Negative mass is a theoretical concept that does not exist in reality; it is sometimes used in comparative discussions but cannot be created. The community encourages further reading on the topics to clarify confusion. Overall, the mysteries of dark matter and dark energy remain unsolved in contemporary science.
Aero_Arnendu
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Hello Friends,
I, Arnendu Barman, is a high school last year student. I have much confusion in Dark Energy and Dark Matter. Actually I do not understand them and I also have problem on Negative Mass.
So friend please help me . Thank you...
 
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Give the following two articles a read and see if they help. Note that dark matter and dark energy are not related. They both simply share the word 'dark' in their name.

https://en.wikipedia.org/wiki/Dark_matter
https://en.wikipedia.org/wiki/Dark_energy

Negative mass is more problematic to discuss. Purely negative mass isn't known to exist, but the term can be used in situations where the mass of something is 'taken as negative' simply as a comparison to another state.
 
Can you tell me how to make a particle that has negative mass ?
 
Such a thing is not possible.
 
Hi Arnendu:
At this time no one knows what dark matter and dark energy are. We can talk about what properties they might have, or even must have, but that is all.
 
Is a homemade radio telescope realistic? There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs. Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...

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