Spokes - Informal name given to the transitory radial features in the B Ring, appearing dark when seen in backscattered light and bright in forward scattered light. T Telemetry - Radio signals from a spacecraft used to encode and transmit data to a ground station. Torus - Solid geometrical figure with the shape of a doughnut or innertube, as in the toroidal hydrogen cloud surrounding Saturn near the orbit of Titan. Trailing Side - For a satellite that keeps the same face toward the planet, the hemisphere that faces backwards, away from the direction of motion. Troposphere - The lower regions of a planetary atmosphere where convection keeps the gas mixed and maintains a steady increase of temperature with depth.
Most clouds are in the troposphere.