It is raining here as another winter storm bears down on California, so I thought I’d be lazy. WUWT readers like a puzzle. This is a relatively easy one I think -take your best guess as to what caused the big dust plume, then see the answer and more photos after the break.
Soyuz TMA-18 Descent Module Landing
A comment on Reddit claims the dust below is from retro rockets fired just before landing to soften impact, and not from the impact itself.
The four-quadrant dominant plumes appear to support that claim.
full slide show here
Just think, 20 years ago these would be top secret photos, my how the world has changed.