#planetary-alignment

#planetary-alignment

At the time of the alignment, Greg Brown, an astronomer at the Royal Observatory Greenwich, told PA Media: Groups of three, four or even five planets being visible aren't uncommon, regularly appearing throughout each year But the more planets are involved, the more things need to be aligned to be visible at once. According to Nasa, multi-planet viewing opportunities can last from weeks to more than a month, as planetary movements are slow and gradual.