Skywatchers are in for an end-of-year treat. Video: 'Great conjunction' of Jupiter and Saturn is closest since 1623 Related: Get ready for the 'Great Conjunction' of Jupiter and Saturn From NASA: The event next week will be the first visible to most areas since 1226, nearly 800 years ago. 21, but their last pairing was not visible to most observers on Earth. Saturn and Jupiter will be at their closest in the night sky for the first time since 1623 on Dec. The event, a rare meeting of the planets, has been billed as a 'Christmas Star' celestial sight. EST (1900 GMT) to offer a detailed guide on how to see the 'Great Conjunction' of Jupiter and Saturn on Dec.

NASA will broadcast a NASA Science Live episode at 3 p.m. During the event, known as a 'great conjunction,' the two planets (and their moons) will be visible in the same field of view through binoculars or a telescope. 21, 2020, Jupiter and Saturn will appear just one-tenth of a degree apart, or about the thickness of a dime held at arm's length, according to NASA.

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