SafeFriction on YouTube Dark Matter ; the Undetectable Mass link: youtu.be/GBDsvf0CFGI?list=UU5UjwumC4u7iKWA-pcS2fJg A look at the theory of dark matter -- the undetectable mass thought to make up 96% of the universe, and dark energy -- the unseen force that is expanding the universe. Physicists use the latest cutting-edge technology and conduct groundbreaking experiments in an attempt to discover more about these mysterious forces. In astronomy and cosmology, dark matter is a type of matter hypothesized to account for a large part of the total mass in the universe. Dark matter cannot be seen directly with telescopes; evidently it neither emits nor absorbs light or other electromagnetic radiation at any significant level. Instead, its existence and properties are inferred from its gravitational effects on visible matter, radiation, and the large-scale structure of the universe.
Posted on: Wed, 29 Oct 2014 16:39:31 +0000
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