Estimation based on steady

Estimation based on steady - Estimation based on...

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Estimation based on steady-state universe Sir Fred Hoyle calculated the mass of an observable steady-state universe using the formula: [50] which can also be stated as or approximately 8 × 10 52 kg. Here H = Hubble constant , ρ = Hoyle's value for the density, G = gravitational constant and c = speed of light . Most distant objects The most distant astronomical object yet announced as of January 2011 is a galaxy candidate classified UDFj-39546284 . In 2009, a gamma ray burst , GRB 090423 , was found to have a redshift of 8.2, which indicates that the collapsing star that caused it exploded when the universe was only 630 million years old. [51] The burst happened approximately 13 billion years ago, [52] so a distance of about 13 billion light years was widely quoted in the media (or sometimes a more precise figure of 13.035 billion light years), [51] though this would be the "light travel distance" ( see Distance measures (cosmology) ) rather than the " proper distance " used in both
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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