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"A luminous star, of the same density as the Earth, and whose diameter should be two hundred and fifty times larger than that of the Sun, would not, in consequence of its attraction, allow any of its rays to arrive at us; it is therefore possible that the largest luminous bodies in the universe may, through this cause, be invisible." -- Pierre Laplace, The System of the World, Book 5, Chapter VI (1798).
We continued our discussion of General Relativity. Covered were:
For our discussion of the Expanding Universe we made a brief beginning of describing Big Bang Cosmology; we will continue this next time. A document on The Standard Hot Big Bang Model of the Universe is available It is accessible from the General Relativity document, but as a convenience a link to the html version is also available here and a link to the pdf version is available here.
Answer the question in the A Favorite Puzzle section of the General Relativity Supplementary Notes, and explain why your answer is correct. This assignment will be marked pass/fail, as usual.
The assignment is due in your first tutorial after Reading Week, Thursday February 28 or Friday March 1.