This month, sky-gazers around the world will be treated to a stunning astronomical display, in the form of a super blood wolf moon.
The first lunar eclipse of the year will see the moon appear red in the night sky.
Best of all, it'll be visible from the UK, as well as other areas around the world.
Here's everything you need to know about the super blood wolf moon, including how and when to see it.
The super blood wolf moon will appear for around three hours on January 21.
From the UK, the best time to see it will be at around 5:15am GMT – so get yourself a strong coffee at the ready!
Meanwhile, over the Americas and northern and western Europe the best time to see it will be just after 02:30am.
The super blood wolf moon is a rare combination of two events – a total lunar eclipse and a supermoon.
During a total lunar eclipse, the moon glows red (hence the 'blood' in the name).
This happens as the Earth passes directly between the sun and moon, casting a shadow across the moon.
NASA said: "A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon.
Meanwhile, a supermoon occurs when a full moon occurs at or near the perigee – its closes point to Earth.
For your best chance of seeing the super blood wolf moon, try to head to an area with little light pollution – for example in the countryside.
Head out early to let your eyes acclimatise to the darkness.
Remember to bring layers – it's likely to be chilly!