Jupiter Backs Up

   The giant outer planet Jupiter slows down and reverses its orbital motion on Friday January 8th as it begins its more or less annual retrograde motion. Retrograde motion is an apparent motion that occurs for an outer planet (past Earth’s orbit) when the faster moving Earth catches up with and then passes by the outer planet. During this retrograde motion Jupiter will move westward near the stars of Leo the Lion.
   Jupiter currently rises about an hour before midnight local time and is very visible above the southwestern horizon sunrise.

   
   
   
Caution: Objects viewed with an optical aid are further than they appear.
   Click here to go to the Qué tal in the Current Skies web site for more observing information for this month.

One thought on “Jupiter Backs Up

  1. Pingback: Mercury Moves Forward | Bob's Spaces

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