Pedigree refers to ancestry, and has nothing to do with astronomy. You may be thinking of perigee, the closest point of approach to the Earth in an orbit. Apogee is the opposite; the farthest away from the Earth in its orbit.
pedigree chart
pedigree chart
My mutt has no pedigree.
Pedigree Fish?
They are looking for animals with pedigree. It means showing the animal of it's true bred.
A pedigree shows how a trait is inherited.
A pedigree analyst studies the pedigree of a horse to help determine its potential as an athlete
You have to purchase a rabbit that already has a pedigree to get a pedigree.
Pedigree Petfoods was created in 1957.
I have bought a pedigree dog.
He bred pedigree dogs. As his parents and grandparents were good athletes, he had a good pedigree as a sprinter.