Wherever they were when they died, there was a real sky above that place: stars in their exact positions, one of them closest to directly overhead. In most cases no one recorded it — but it is not lost. It can be recomputed, exactly, from the date, the time and the place.
Use the free calculator: the date of passing, the time (as exact as you know it), and the place. Standard astronomical algorithms rebuild the sky of that instant and return the star closest to the zenith. The same inputs always give the same star — verifiable in any planetarium app.
If you want to keep it, that star can carry their name: a permanent memorial with a certificate, a 3D return to the sky of that night, and a private memorial space. The days that keep coming back have somewhere to go.
You don’t have to remember that night’s sky.
Just the date, the time and the place — the sky fills in the rest.