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Using speed measurements of the gas at different distances from the Galactic center, the Sun appears to be cruising along at 200 kilometers per second and it takes 240 million years to complete the grand circuit around the Galaxy. This speed is an absolute speed.
Best Answer: Speed is relative. In our orbit around the sun: 107,225 kph (66,630 mph). However, the sun is traveling, too, in its orbit around the center of the galaxy. To orbit the sun, we will travel a little faster in January (perihelion) and slower in January (aphelion), but we average 782,460 kph (486,220 mph).