We examine astronomical observations that would be achievable over a future
timeline corresponding to the documented history of human civilization so far,
$\sim 10^4$ years. We examine implications for measurements of the redshift
drift, evolution of the CMB, and cosmic parallax. A number of events that are
rare on the scale of centuries will become easily observable on a timescale
$\sim 10^4$ years. Implications for several measurements related to gravity are
discussed.
