From: kuakinar@videotron.ca   
      
   Le 2025-07-14 à 19:44, casagiannoni@optonline.net a écrit :   
   >>   
   >> Our fastest spacecraft is slower than light by a factor of about   
   >> 30,000 .   
   >>   
   > Not sure of my estimate here.   
   >   
   > Just how fast is our fastest spacecraft ?   
   >   
   > Anyone ? ...   
      
   A 30 000th of the speed of light (about 300 000Km/s) is about 10   
   Km/second. That's slower than the orbital speed of the ISS and other   
   objects in low Earth orbit : 12 to 20Km/s depending on the altitude of   
   the orbit. Crewed crafts reentering the atmosphere travel at around   
   25Km/s, ±3Km/s.   
      
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