The planets will be visible in the night sky on Thursday.
Two of the five should be seen with the naked eye, while the other two should be seen with binoculars.
It will be difficult to see Mercury and Venus in the UK.
The best time to view the spectacle is after the sun goes down.
Those further south are more likely to be able to see all the planets in the sky.
Further south, Mercury will be seen more.
Planets do not twinkle. Mars will be red and Jupiter will be bright.
The best time to be in the UK is about 2032. It's going to be a long time before we see this one again, so it's worth taking a look now.
Dr Massy encourages sky-watchers to look towards the south-west horizon after the sun sets.
It will be a challenge for the UK to see Venus in the south-west.
Jupiter is the next bright planet and should be seen in the sky.
Dr Massy says anyone looking through a telescope should be able to see Jupiter and Mars.
Skies are expected to be clear in the south-west of England. The view could be obscured by clouds in the north.
There were five planets visible when they aligned in June.