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Assuming we live in a universe well described on large scales with Qmp = 0.3 and QAQ = 0.7, and (2:50 2 0, H0 2

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Assuming we live in a universe well described on large scales with Qmp = 0.3 and QAQ = 0.7, and (2:50 2 0, H0 2 2.23 X 101\"5 512, what does the future hold? First, make some calculations about how the scale factor a(t) and Hubble \"constant\" H(t)= S vary with time well beyond the preSent day, to = 13.7 Gyr. 1. What would future astronomers measure for the energy density at, say, t = 50 Gyr (relative to the critical density at t = 50 Gyr)? 2. What about the temperature of the Cosmic Mcrowave Background, and how would they observe it? 3. Think about the Hubble diagram of the distance of standard candles (cg. galaxies or Type Ia SN) vs redshift. What would this look like and how would it be measured? This is, what might galaxies look like? Would it be easier or harder for some future civilization to determine what kind of universe they live in, and why

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