3 ms·
FWIW, a duration of: 15Gyr c * (c ln(2))^2 / G / (1MW/c2) (the maximum lifetime of a Kardashev-0 (1MW) civilization with a power suppy as large as will fit
by a1369209993 6y ago
FWIW, a duration of:
15Gyr c * (c ln(2))^2 / G / (1MW/c2)
(the maximum lifetime of a Kardashev-0 (1MW) civilization with a power suppy as large as will fit into the observable universe without collapsing into a black hole) is about 2^212 seconds, so a 256-bit time value with quarter-nanosecond (exactly 2^-32 seconds) precision would be sufficient for any plausible application involving unmodified biological humans under known physics.
- WJW 6y agoWouldn't the observable universe have expanded quite a bit by then?
- a1369209993 6y agoYes, but it won't have gained mass because of the cosmological event horizon resulting from the expansion of the universe. (That is, anything that's not in the observable universe already is moving away with a effective speed due to Hubble expansion greater than the speed of light, and thus can't[0] be retrieved for use as fuel.) 0: without violating the known laws of physics