5 fastest space aircrafts that can cover 100s of kilometres in seconds

Speed is one of the most vital factors in space missions. To reach distant planets, study the Sun, or escape Earth’s gravity, spacecraft must have high velocities. Over the decades, space agencies around the world have designed and launched probes that have pushed the limits of speed, and every such mission hyas had spacecrafts, setting new records and expanding our knowledge of the cosmos. As of 2025, the fastest spacecraft have achieved mind-boggling speeds that are measured in kilometers per second.


Here are the top five fastest spacecraft ever launched

NASA’s Parker Solar Probe holds the record for the fastest spacecraft ever built. Launched in 2018, it was designed to study the Sun’s outer atmosphere, called the corona. By performing multiple close flybys of Venus, the probe uses gravity assists to accelerate and dive closer to the Sun than any previous mission. This has helped Parker Solar Probe reach speeds up to 192 kilometers per second, with future encounters expected to push it beyond 200 km/s, setting an unprecedented speed benchmark in space travel.

Launched in 1976 through a joint NASA and German Aerospace Center mission, Helios 2 was build to study solar wind and magnetic fields near the Sun. The spacecraft approached within 43 million kilometers of our star, allowing it to reach a top speed of 70.2 km/s. This made Helios 2 the fastest spacecraft for many years, gathering valuable data about the Sun’s behavior and gathering info about solar dynamics before being surpassed by Parker Solar Probe decades later.

Helios 1, launched in 1974 as a companion to Helios 2, played a critical role in early solar research. It shared a similar orbit to Helios 2 and recorded a maximum speed of 66 km/s. The mission provided essential measurements of the solar atmosphere and the solar wind’s properties, being the basis for more advanced missions. Helios 1’s contributions helped shape how scientists observe and interpret the Sun’s influence on the solar system.

NASA’s New Horizons, launched in 2006, achieved one of the highest launch speeds ever recorded at 16.3 km/s. Its primary goal was to perform a historic flyby of Pluto, providing the first close-up images and data of the dwarf planet in 2015. After that milestone, it continued its journey into the Kuiper Belt to study other icy objects. New Horizons remains one of the fastest spacecraft still operational.