Christmas Star 2020: Here's how you can see 'The Great Conjuncton' as Jupiter and Saturn to be closest for 400 years

A dazzling 'Christmas star’ is set to be visible in the skies over Portsmouth in the coming days.
Stargazers could spot a bright light in the sky days before Christmas, similar to that which is said to have led the three wise men to the nativity scene, according to an astronomer. Picture: International Dark Sky Associati/PA WireStargazers could spot a bright light in the sky days before Christmas, similar to that which is said to have led the three wise men to the nativity scene, according to an astronomer. Picture: International Dark Sky Associati/PA Wire
Stargazers could spot a bright light in the sky days before Christmas, similar to that which is said to have led the three wise men to the nativity scene, according to an astronomer. Picture: International Dark Sky Associati/PA Wire

The celestial event will be caused by the ‘great conjunction' of Saturn and Jupiter.

In astronomy, a conjunction refers to when two or more planets line-up from Earth’s view.

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According to Nasa it has been nearly 400 years since Jupiter and Saturn passed by this close by each other.

It will also be 800 years since they passed so closely at night.

The ‘great conjunction’ which has been dubbed a ‘Christmas star’ – will happen on Monday and it will be visible from Portsmouth.

In a tweet astronaut Tim Peake, he said that it will be visible in the UK from 4.30pm on December 21 until 6.20pm, when they will sink below the horizon.

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He also advises that you should look to the south west to spot the conjunction.

During the event, Jupiter and Saturn will appear to be just 0.01 degree apart in the sky.

The planets last appeared this close in 1623, so it is a once-in-a-lifetime event.

It also happens to coincide with the Winter solstice – also known as the shortest day of the year.

A message from the Editor, Mark Waldron

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