Christmas star: Jupiter and Saturn set to align in the night sky

Last Updated on 1 month by News Admin

Jupiter and Saturn are set to cross paths in the night sky, appearing to the naked eye as a “double planet”.

The timing of this conjunction, as the celestial event is known, has caused some to suggest it may have been the source of a bright light in the sky 2,000 years ago.

That became known as the Star of Bethlehem.

The planets are moving closer together each night and will reach their closest point on 21 December.

Keen stargazers in the UK will have to keep a close eye on the weather to avoid an astronomical disappointment.

“Any evening it’s clear, it’s worth grabbing a chance, because the weather doesn’t look great,” Dr Carolin Crawford from the University of Cambridge’s Institute of Astronomy told the BBC.

If there is a gap in the winter gloom, both planets will appear in the southwest sky, just above the horizon shortly after sunset.

What hope for UK star-gazers?

Monday is going to be a cloudy day with rain for some and while there was some hope a few days ago that the cloud will clear away this evening, this is now looking unlikely for most. There could be a few cloud breaks across England, the best of any clear skies will now be limited to Northern Ireland and Western Scotland. You’ll need to look to the south west, low on the horizon after dark but before 6.30pm when Jupiter and Saturn set below the horizon.

Is this the return of the Star of Bethlehem?

Some astronomers and theologians think so.

As Prof Eric M Vanden Eykel, a professor of religion from Ferrum College in Virginia, pointed out in an online article the timing has led to a lot of speculation “about whether this could be the same astronomical event that the Bible reports led the wise men to Joseph, Mary and the newly born Jesus”.

That is not just modern, festive speculation. The theory that the conjunction of Jupiter and Saturn might be the “Star of Wonder” was proposed in the early 17th Century by Johannes Kepler, a German astronomer and mathematician.

“2,000 years ago, people were a lot more aware of what was happening in the night sky,” said Dr Crawford, “[so] it’s not impossible that the Star of Bethlehem was a planetary alignment like this”.

How rare is the event?

As planets cross paths on their journey around the Sun, conjunctions are not particularly rare, but this one is special.

BBC

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