For tw: Amazing results from Stardust mission

[bluesdave]

I'm posting this while thinking of tw - the story shows how good science comes from non-manned space missions.

Contrary to a popular scientific notion, there was enough mixing in the early solar system to transport material from the sun's sizzling neighborhood and deposit it in icy deep-space comets. It might have been like a gentle eddy in a stream or more like an artillery blast, but evidence from the Stardust mission shows that material from the sun's vicinity traveled to the edge of the solar system, beyond Pluto, as the planets were born.

The full story.