About an hour before sunrise on Monday morning, Venus and Jupiter will rise as one, in a spectacle that will amaze stargazers.
The planets, which orbit the sun about 416 million miles apart, will be just 17 arcminutes from each other when viewed from Earth.
For context, this is approximately half the diameter of the moon.
Venus and Jupiter will both be visible in the eastern sky, staying low on the horizon.
How to watch the Venus Jupiter conjunction in the UK
Skywatchers in the Northern Hemisphere will get the best views of the phenomenon, with those in Britain likely to get an especially clear view.
Venus will rise at 5.56am in the UK, with Jupiter following two minutes later at 5.58am.
The planets should be visible for more than an hour depending on viewing conditions, though light from the sun is expected to block out Jupiter about 15 minutes before sunrise.
Those hoping to watch the display are advised to find a high spot with a clear view of the eastern sky, as the planets will only rise about 11 degrees above the horizon.
How to watch the Venus Jupiter conjunction in the USA
The conjunction will be slightly more difficult to watch in the United States, because sunrise comes earlier than in Britain.
Viewers in New York will see the Jupiter rise first at 5.26am, with Venus coming at 5.31am, according to Space.com.
The planets will be slightly further apart and will appear in the constellation Virgo.
Anyone too far west of New York will miss the actual conjunction, though Venus and Jupiter will rise hight in the sky than for the UK: 12.8 degrees and 12.9 degrees respectively.
How to watch the Venus Jupiter conjunction in Australia
Unfortunately, the conjunction does not favour viewers in the Southern Hemisphere.
The two worlds will only be visible for a short time before sunrise and won’t climb more than about 7 degrees above the horizon.
No matter where you are, experts recommend travelling to a rural location away from any light pollution.
Both Venus and Jupiter will be visible to the naked eye, though a telescope of powerful pair of binoculars will give a clear view – if you are lucky, you might catch a glimpse of Jupiter’s moons.
Read more: WHAT IS THE VENUS JUPITER CONSTELLATION