The meaning of legal maxim ‘a caelo usque ad centrum’ is from the sky to the center.
A phrase describing the vertical extent of the owner’s right.
Explanation
Or “from heaven all the way to the center of the earth”. In law, can refer to the obsolete cuius est solum eius est usque ad coelum et ad inferos maxim of property ownership (“for whoever owns the soil, it is theirs up to the sky and down to the depths”).