Planet Four Talk

Question: What are these bright circular features at the sources of fans? Are they craters?

  • Portyankina by Portyankina scientist

    Example: APF0000j1b

    Answer: These a boulders. They stick out of the ice layer and get warm faster than the ice around them. Only the ice that directly touches them starts to sublime, this is how the fans tend to develop starting at those boulders.

    Anya

    Posted