Final answer:
The strongest winds are found in the atmosphere of giant planets such as Jupiter and Saturn, with jet streams reaching speeds of up to 90 meters per second at the equator.
Step-by-step explanation:
The strongest winds are found in the atmosphere of giant planets such as Jupiter and Saturn. These planets have underlying east-west wind patterns, with jet streams that can reach speeds of up to 90 meters per second (300 kilometers per hour) at the equator. At higher latitudes, there are alternating east- and west-moving streams.