From: here@is.invalid   
      
   Asteroid Apophis Could Still Hit Earth in 2068, New Measurements   
   Suggest   
      
   Only a small handful of objects are known to pose a serious threat to   
   Earth, and the gigantic asteroid Apophis is one of them. Scientists   
   are now re-evaluating its potential to strike our planet in 48 years,   
   owing to improved observations of the problematic asteroid.   
      
   Observations made earlier this year from the Subaru Telescope in   
   Hawai'i are providing astronomers with a better sense of how the   
   Yarkovsky effect is influencing the orbital path of asteroid 99942   
   Apophis. This effect is like a built-in propulsion system for   
   asteroids, in which trace amounts of leaking radiation can alter an   
   object's momentum in space, causing it to drift ever-so-slightly from   
   the path otherwise chosen by gravity.   
      
      
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)