astronomyseeker

Do certain comets and/or asteroids have well known density characteristics? Would a Oort comet be more likely to end in an "above ground" explosion ( Tunguska Event) as opposed to making it all the way down to the surface and making an impact?

Are there any plans to monitor Deimos or Phobos during the movement through the dust cloud? Do either of these two bodies have a "shell" of material around them already and would bombardment of dust from the comet show these shells?