for scene 1 of the video " Dark Matter: 'Discovered'" by Rolf Witzsche
here for a larger image
Dark matter is a hypothetical phenomenon
Dark matter is a hypothetical phenomenon. It is a type of matter that cannot be seen with telescopes.
Is that a paradox: Matter that cannot be seen?
It is deemed to exist in such abundance that it accounts for most of the matter in the Universe.
Does the paradox deepen?
The existence of dark matter is inferred from its effects on the visible universe. While its presence cannot be detected directly, its effect reveals its existence. This makes dark matter one of the greatest mysteries in modern astrophysics. Some say, that up to 90% of all the matter of the universe exists as "dark matter," or a subset of it that is termed "dark energy."
This doesn't solve the paradox, does it?
Actually, the existence of dark matter was theorized as a means for solving a great paradox in astrophysics.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.