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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.
Its average distance from the sun is 58,000,000 km-so in going once round it travels 360,000,000 km (approximately), and it does this on 88 days, so the average speed is 4.0 â¦ 9 million km per day, or 170,000 km/hour, or 47 km/sec. 2 people found this useful.Shamus Jenner.ts average distance from the sun is 58,000,000 km-so in going once round it travels 360,000,000 km (approximately), and it does this on 88 days, so the average speed is 4.0 â¦ 9 million km per day, or 170,000 km/hour, or 47 km/sec. 2 people found this useful. Shamus Jenner.