First, look at this picture:
What do you think that is? Obviously the article name is a clue. The space shuttle Discovery recently released 150 pounds of astronaut urine and waste water into space. Apparently space regulations ban astronauts from dumping waste water at the International Space Station, so they wait until they undock before releasing their excrement waste.
There’s a little more info and another picture at this link: Space Shuttle Unleashes Magnificent Plume of Pee.
If you missed seeing it, a NASA spokeswoman said it’s a fairly common sighting. While it looks cool, it seems like there’s probably a better way for dumping that kind of waste… Hopefully it all burns up, but I don’t know. I do know that you don’t want to think about it too much…