• The celestial conjunction will be visible in the night sky tonight until Christmas
• Jupiter and Saturn have been appearing closer in the sky since the summer
• Viewers worldwide will able to see the show — but most easily from the equator
• In the UK, the best view, weather permitting, will occur in the hour after 3.48pm 
• The planets will appear in the western sky, low above the horizon after sunset
• The duo will not seem to come this close together again until March 15, 2080 

Those in London and New York will see the planets close to the horizon — at around 5.3° and 7.5°, respectively - around an hour after the sun sets tonight.