We've seen tie-die hair and even PSL hair, and now "galaxy hair", is the latest movement among the colour-change addicts out there. And this one's a goodie. 

Inspired by outer space, planets, and all the colours that come along with them; blues, purples, reds and burnt orange – the result of cosmic colouring is ALL over Instagram. 

The trend for bold and bright tones started in America, but high-maintenance hair lovers in the UK and Ireland have been quick to catch on. 

Of course the trend requires A LOT of bleaching the hair first but with wonder hair repair treatments, like Olaplex, popping up in hairdressers everywhere, the world (or should we say solar system) is your oyster to experiment like these IG ladies without any bother. 

Such pretty colours: