DanielH wrote:That’s why I said teleportation was good in the short term.
You don’t know when to plant crops without a somewhat precise calendar, and the constellations are the most precise calendar available. Obviously a civilization could figure this out a second time, but it would be a number of bad years before that and I think the population would be too large to be supported by the poor harvests. I think you also get an advantage for harvesting at the right time, but I’m not as sure about that because you can judge if a crop is ripe by looking at the crop itself.
On Earth, at least, the following things seem at least as precise to me as constellations:
-phases of the moon
-dates when various plants start to flower/bud/leaf/fruit at a given latitude
-when domesticated animals of various sorts go into heat
-days since last frost at a given latitude
-days since beginning/end of monsoon season, where appropriate
-timing from the solstice/equinox (which you can measure based on direction of shadows at noon/sunrise/sunset, c.f. Stonehenge)
I think of constellations much more as navigation aids than timing devices.
Obviously the first method relies on having a moon, which might not be generic for habitable planets, but I'd imagine the others work on any planet which contains enough plants/animals for agriculture to matter and enough of an axial tilt for seasons to be a thing (and if they aren't it shouldn't matter when you plant crops). Changes outside the solar system shouldn't affect them.