Jupiter and Saturn will align in the night sky on Dec. 21 in an event astronomers call the "great conjunction" marking the planets' closest encounter in nearly 400 years.
'Great Conjunction' 2020: NASA tips to see Jupiter and Saturn shine as a 'Christmas Star'
SPACE.com - 18 Dec 2020 19:32
Jupiter and Saturn will align in the night sky on Dec. 21 in an event astronomers call the "great conjunction" marking the planets' closest encounter in nearly 400 years.
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