What's that in blobs per hour, I wonder.

Space: the final junkyard:

Ailor said that among the stranger debris is a Russian satellite with an onboard nuclear reactor that is “leaking liquid metal -- something like 70,000 blobs of liquid metal (so far).” He said the world's space agencies are collaborating on ways to develop anti-debris protocols for future launches.

A San Francisco Chronicle piece about junk in orbit makes the point that all of it eventually comes back to Earth, burns up in the atmosphere - but what happens when radioactive material “burns up?” You're not asking me I hope. I haven't the foggiest. I'm thinking about buying an umbrella though, myself.