A Match Made In The Heavens: Jupiter And Saturn Side By Side For 1st Time Since 1623

Look up at the night sky this month to see a rare, spectacular celestial event: Jupiter and Saturn forming a Great Conjunction.

Though the two largest planets in our solar system come together every 20 or so years, this event will mark the closest they've been since 1623. On Dec. 21, the winter solstice, the planets will be close enough for at-home observers to see both simultaneously through the same telescope, says Dean Regas, head astronomer at the Cincinnati Observatory.