Space fairy spells are complicated and can last fractions of a fraction of a fraction of a second or millions of billions of years. Either the conjure and/or the cast. That is, to say, a spell may be nearly instantly conjured up and cast over a very, very long time, or vice versa.
To these eyes, they contain shapes, mathematics and much determined passion. Of course, there is much more.

I find space maths difficult and I’m often distracted.