Think about plotting a "plane" of all possible OmegaM, OmegaL values. On this plane we can also plot regions that show
So what values for lambda do we get from the supernovae? Acceleration means OmegaL is "beating" OmegaM.
Things to notice.
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CMB = microwave background, sensitive to shape of space SNe = supernovae, sensitive to R(t), the rate of expansion of the universe BAO = tracing large scale structure of galaxies, sensitive to matter density parameter. Working together, they suggest we live in a universe with:
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