What proof do we have that dark matter exists.
The moral of the story here is that, there is no reason to ask a question cold in this day and age. You need to first put in some effort to learn things on your own, and then seek help when you encounter a problem. Question such as this, when it can easily be researched online, just shows lack of effort.Oh well, thx for that.
Hi Manraj, welcome to PF! I think you said in another thread that your basis for gaining understanding of interesting questions like this is your 10th grade physics textbook. This is a really good question to be asking at this stage!What proof do we have that dark matter exists.
My pleasure, Manraj!Thanks a lot, Marcus!
OK. Well please let me know if you have met the "equivalence principle" in any of your reading about relativity. I think it comes up in a lot of popular non-technical accounts. People draw cartoons to illustrate it etc etc.Btw, since you ask, i am a fourteen year old who just happens to be really interested in physics...
Good. The wikipedia article I think you said was helpful wasYou know that actually made a lot of sense to me. I've learned a lot in the past 2 hours...
For future reference, "marcus" would be OK if you want (I don't require a "Mr"). Best wishes as to the optics test.Thanks, Mr genius. In fact i just have a test coming up on refraction of light through lenses. I guess we have had enough of time dilation for now!
I think that's right. In any case I've gotten the impression lately that that's where things are going.... In this case, the response might be, we have ample evidence that dark matter exists; the interesting question now has become*, what is dark matter, exactly? Here are some theories ...
*This may not be the case; I don't know.
Good work assembling several relevant papers and focusing our attention on this, Chronos!I'm optimistic about the sterile neutrino, and could also explain baryon asymmetry and neutrino oscillations - which is interesting. It also looks like a natural extension to the standard model that does not require a massive paradigm shift. I anticipate a flood of papers on this over the next year or two. It might even influence the next cycle of LHC research, as these energy ranges are well within LHC capabilities. This could prove an enormous boon to the legacy of LHC and future research initiatives. We live in exciting times.