Physically this quantity is associated with an energy

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Unformatted text preview: ons and electrons. 1 Clumping of Dark matter was critical to convert smoothly spread matter into clumps and hence the galaxies and stars we see today. Supernovae as sign posts – comparing the apparent brightness to the known intrinsic brightness allows a measure of distances. Type Ia supernovae – bright, uniform behavior make them a tool for measuring distances. Exploding white dwarf in a binary system. Accelerating Universe – measurement of Type Ia supernovae shows that the expansion of the Universe is not decelerating at all at the current time, but accelerating. Dark Energy – if the Universe is accelerating, there seems to be an extra force associated with empty space. In the context of Einstein’s theory of gravity, this force could be provided by the c...
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This document was uploaded on 02/18/2014 for the course AST 309N at University of Texas.

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