Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe

Details Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe

1999-02-12

arxiv.org/abs/astro-ph/9902189v1

Astrophys.J. 531 (2000) 22-30

Astronomy and Astrophysics

Astrophysics

23 pages, latex, submitted to Ap.J

Scientific paper

10.1086/308434

Current evidence suggests that the cosmological constant is not zero, or that we live in an open universe. We examine the implications for the future under these assumptions, and find that they are striking. If the Universe is cosmological constant-dominated, our ability to probe the evolution of large scale structure will decrease with time ---presently observable distant sources will disappear on a time-scale comparable to the period of stellar burning. Moreover, while the Universe might expand forever, the integrated conscious lifetime of any civilization will be finite, although it can be astronomically long. We find that this latter result is far more general. In the absence of possible exotic and uncertain strong gravitational effects, the total information recoverable by any civilization over the entire history of our universe is finite, and assuming that consciousness has a physical computational basis, life cannot be eternal.

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