dark matter

What is dark matter?

dark matter definition and meaning on Science terms:
Name given to the amount of mass whose existence is deduced from the analysis of galaxy rotation curves but which until now, has escaped all detections. There are many theories on what dark matter could be. Not one, at the moment is convincing enough and the question is still a mystery.

 

reference: https://imagine.gsfc.nasa.gov/resources/dictionary.html

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