Planetary gear and gas turbine engine

A planetary gearbox comprising:

• a planet carrier, including a planetary gear that is disposed so as to be rotatable on the planet carrier,
• at least one further gear that meshes with the planetary gear,
• wherein the planet carrier includes an oil supply installation which comprises a supply line for oil and at least one opening connected to the supply line and configured to direct oil from the supply line in at least one chosen from a direction of the planetary gear and the at least one further gear, for at least one chosen from cooling and lubricating;
• wherein the oil supply installation further comprises at least one shielding region which protrudes from an external side of the oil supply installation and which is positioned in front of the opening in relation to a primary rotating direction of at least one chosen from the planetary gear and the at least one further gear and which forms an oil collection groove on the external side of the oil supply installation that faces the primary rotating direction of the at least one chosen from the planetary gear and the at least one further gear;
• and
• wherein a depth of the oil collection groove, proceeding from a center between two end regions of the oil collection groove, decreases in an axial direction of the planetary gearbox toward the end regions of the oil collection groove.