Planetary gear and gas turbine engine

A planetary gearbox having a planet carrier, having at least one planetary gear that is disposed so as to be rotatable on the planet carrier, and having at least one gear that meshes with the planetary gear, wherein the planet carrier is configured having an oil supply installation which for the supplied oil comprises a supply line for oil to at least one opening, wherein the oil for cooling and/or lubricating is capable of being directed out of the opening in the direction of the planetary gear and/or the gear, and wherein the oil supply installation in relation to a primary rotating direction of the planetary gear and/or the gear in front of the opening comprises at least one shielding region which protrudes from an external side of the oil supply installation and which by way of the external side of the oil supply installation on a side that faces the primary rotating direction of the planetary gear and/or the gear delimits an oil collection groove.