Jupiter passed on the far side of the Sun less than a month
ago, but it already has returned to view before dawn in the east sky. The giant
planet rises about 80 minutes before our sun. Shining brightly, it stands out
even in twilight below Venus and Mars. The three morning planets will undergo a
spectacular series of conjunctions during October. A conjunction is a close
grouping of celestial sky objects. Here is an evening shot I took showing the conjunction of Jupiter and Venus in the western sky on July 1, 2015.
Our sister planet Venus reaches its greatest brilliancy of
the year September 21. Mars lies to its
lower left, glowing in a lovely orange color contrast. Meanwhile, Jupiter hugs
the horizon 10° below Mars, the span of your closed fist held at arm’s length. Mercury
joins the planetary trio in October’s morning sky for the most gorgeous
planetary lineup of 2015. A crescent Moon briefly joins the crowd, jumping from
one planet to the next in four consecutive days beginning on October 9th.
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