We'll have some year notes:
Most orbital launches ever
Most humans in space at the same time (both orbit and suborbital at once)
Soviet Family Tree video

A memoriam for:
William Thornton
George Carruthers
Michael Collins
Allan McDonald
Glen de Vries

We'll say goodbye to the following bits of hardware / missions:
Suborbital Starships

Honorable Mentions:
Starship Stacked
Firefly Alpha Launch Attempt
SLS Stacked
Science missions launched (IXPE, LUCY, DART)

Question Title

* 1. What was the biggest spaceflight or space science event in 2021? Think in scale of long term importance, not necessarily just "cool"... think "IMPACTFUL"

T