Peti
- Popo
- Petit , Alexis-Thérèse
- Petit, Alexis-Thérèse
- Phillips
- Phillips , William
- Piazzi , Giuseppe
- Picard , Jean
- Pickering , Edward Charles
- Pickering , William Henry
- Pictet
- Pictet , Raoul Pierre
- Pincus , Gregory Goodwin
- Pippard , Sir Alfred Brian
- Planck , Max Karl Ernst Ludwig
- Plaskett , John Stanley