The Christmas star - said to be similar to the one that led the three wise men to the nativity scene - will be visible in the sky tonight, astronomers say.
Saturn and Jupiter will come the closest they have done in hundreds of years, creating what the researcher described as a "spectacular event in the sky".
They will appear in the sky tonight, which also the winter solstice, the shortest day of the year. While conjunctions - where objects appear very close to each other in the sky - are not rare, this will be an "exceptionally close" one - the closest since 1623, Professor Michael Burton said.
The two biggest planets in the solar system will be just 0.1 degrees apart, one-fifth the diameter of the full moon, and appear together as the
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