How to fix a Direction in the context of universe? My question is regarding the direction/orientation of earth. Is it a constant with reference to universal parameters?
I had a nice long answer all mapped out, then I came across a similar (identical?) question...
refer answer here:
How does the earth&#39;s plane of orbit (ecliptic) vary over time?

Basically it is changing about 1.4 degrees per 10000 years about now, but that will change chaotically over longer periods.