Quote:
Originally Posted by CraigS
I have a feeling this defines the term 'missing'. In a nutshell, it was predicted, but not found. It was thus 'missing'. Amelia et al are on the path of finding it.
Cheers
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It's the same as saying overlooked. It wasn't literally missing and not, therefore, a part of what was there. They can find it, however, they need to change their methods to do so, or look at old data with different and new "eyes". That's what Amelia did and she found the "missing" mass.
Truly missing mass would equate to what we call DM. You can barely detect it (and then only because of its gravity) and it just doesn't interact with anything ordinary. You can't see it or detect it in any ordinary sense of the definition. So, it becomes literally missing...nowhere to be seen but it's there because everything else is doing this or that because of its presence.