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Tonight, the planet Mercury will come very close to Jupiter and Saturn as all three planets form a triple conjunction in the sky.
The stargazing event has been visible since Saturday, January 9, and will appear for a final time tonight, Monday, January 11.
An event of this kind hasn't happened for over five years, with it last occurring in October 2015.
Here's all you need to know about the rare triple conjunction.
What is the triple conjunction and why is it so rare?
The triple conjunction doesn't happen very often, and this time around it could actually be the last time to catch Saturn and Jupiter in the evening sky for some time.
This is down to the planets descending further towards the sun.
NASA said: "From Friday evening to Monday evening, the planet Mercury will appear to pass first by Saturn and then by Jupiter as it shifts away from the horizon, visible each evening low in the west-southwest and setting before evening twilight ends."
A few weeks ago, when the conjunction began forming, Jupiter was around 550 million miles from Earth, while Saturn was about 1 billion miles away.
However, Mercury, meanwhile, remains millions of miles closer, at about 120 million miles from Earth.
Tonight is the last chance to catch all three in view together, and the reason they look so close is down to their orbits putting them all in a straight line, relative to our planet.
Although this will be the last time we'll be able to see Jupiter and Saturn for some time, Mercury will continue to rise, remaining visible through the end of the month..
How can you view Jupiter, Mercury and Saturn tonight?
As soon as the sun sets this evening (around 4:15pm onwards), the planets should be visible, and there's a 45-minute window where it'll be at its clearest.
This is due to you looking for the planets low-down on the west-southwest horizon, and the planets will appear closer together at this time.
As you look towards the Capricorn constellation you will be looking in the right direction, and finding a spot that has an unobstructed horizon view will help, and clouds will block your view, so bear that in mind.
If you own binoculars or even a telescope, now is the time to use them, but if you don't, you can always use a nighty sky scanning app as some of them will point out the planets to you.
However, stargazing is best when you're in a very dark location and looking at your phone screen can affect your ability to adjust your eyes to the dark.
Out of all three planets, Jupiter will be the brightest so if you're able to spot it first, it won't be hard to find Saturn and Mercury nearby.
However, as the night goes on, Mercury will appear higher, whereas Saturn will always stay below Jupiter for the conjunction.
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