Here's everything you need to know about the programme and when you can watch it…
When is Chris and Michaela Under the Christmas Sky on BBC2?
Chris and Michaela Under the Christmas Sky is airing TONIGHT Sunday December 23 at 9pm on BBC2.
The programme will follow Chris Packham and Michaela Strachan on a journey to discover the wonders of the skies.
Their journey will start in the Arabian desert where they will follow in the footsteps of the three wise men in pursuit of the Star of Bethlehem.
They will also travel to Norway's frozen fjords to catch a glimpse of the Northern Lights.
What are the Northern Lights and the Star of Bethlehem?
The Northern Lights or aurora borealis are a natural phenomenon where coloured lights appear in the sky.
They are predominantly seen in high-latitude regions around the Artic and Antartic.
The Star of Bethlehem is said to be the star which led the three wise men to Jerusalem for the birth of Jesus.
Many astronomers have linked the star to unusual celestial events such as the conjunction of Jupiter and Venus.
Who are Chris Packham and Michaela Strachan
Chris Packham, 57, has a degree in Zoology and is a nature photographer and TV presenter.
He is best known for hosting Springwatch and the Really Wild Show.
Michaela Strachan, 52, made her presenting debut alongside Timmy Mallet in the Wide Awake Club in 1986.
She has also co-hosted Springwatch, Autumnwatch and Winterwatch with Chris.
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