The Parker Solar Probe Is the Fastest Object Ever Made, Reaching 690,000 km/h NASA’s Parker Solar Probe holds the record as the fastest human-made object in history, reaching speeds of about 690,000 kilometers per hour, or roughly 0.064% the speed of light. It achieves this velocity as it dives closer to the Sun than any spacecraft before it. Using repeated gravity assists from Venus, the probe accelerates while withstanding extreme heat, protected by an advanced carbon-composite heat shield. At