Now, that giant space snowball is coming in for its closest pass by Earth this Thursday.
So, somewhere between the width of one and six Jupiters – that’s an utterly epic trail.
Comets tend to behave unpredictably the closer they come to the sun.
Whatever happens, this visit will likely be our only chance to get acquainted with this comet.
Its orbit is so long that it won’t be back for a few million years.