December 17, 2017

Astro event: A Close Planetary Conjunction.

Mars & venus at closest conjunction. (Created by Author in Starry Night).

Mars & venus at closest conjunction. (Created by Author in Starry Night).

 

   The dusk planetary action continues this week with a close conjunction of the planets Mars and Venus. Our two nearest planetary neighbors in space have been playing a game of apparent cat and mouse in the dusk skies, approaching each other within two degrees of arc July 31st, receding, and then approaching again. Closest approach is around August 19th, when both planets are within 1° 45’ of each other as seen from our Earthly vantage point. This is one of the better planetary conjunctions of the year, and a good study in comparative planetary characteristics and orbital mechanics. [Read more...]