Peter Schultz
Peter Schultz
active begin body changing jets looking surface understand whose
We know we're looking at a geologically active body whose surface is changing over time. Now we can begin to understand how and why these jets erupt.
covered finding glued hard layer nature organic powder surface
The most significant finding is the nature of the surface of the comet. We now know that it isn't covered in a hard crust. It's a fine-grained, loosely glued layer of organic powder and ice. You couldn't make a snowball on Tempel 1.