From: alain245@videotron.ca   
      
   On Mar/1/2021 at 08:39, Greg (Strider) Moore wrote :   
   > "JF Mezei"  wrote in message news:JhH_H.146891$Gd7.43328@fx38.iad...   
   >>   
   >> On 2021-02-26 21:25, Sylvia Else wrote:   
   >>   
   >>> And risk an explosion near the rover that could damage it.   
   >>   
   >> The lander was purposefully crashed, so I would assume the risk of   
   >> explosion would have been evaluated. Also, considering the lack of   
   >> oxygen on Mars and very thin atmpsphere, is the risk of explosion   
   >> seriously diminished?   
   >   
   > Come on, you know better than this. This is like saying "how do rockets   
   > work in space if there's no air?"   
   >   
   > The risk of an explosion comes from the fuel already on-board,hydrazine.   
   > It doesn't need air.   
      
   I think his very thin atmosphere comment was about no air slowing down   
   the shrapnel once you have an explosion, not about air being needed for   
   the explosion to occur (which obviously it isn't). That said, even if   
   there isn't aero-dynamic drag to slow down the debris from the   
   explosion, if the explosion is far the chance of being hit becomes low.   
   So I don't agree with Mr Mezei that the risk of the explosion doesn't   
   seriously diminish by sending the lander away for landing.   
      
      
   Alain Fournier   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)