In space, there is no fixed maximum speed for objects. The speed at which objects can travel in space depends on various factors, including the propulsion method used, the amount of propellant carried, and the limitations of the technology involved.
Currently, the fastest human-made object in space is the Parker Solar Probe, which was launched in 2018. It is expected to reach speeds of up to 430,000 miles per hour (700,000 kilometers per hour) as it approaches the Sun. This speed allows the spacecraft to withstand the intense heat and radiation near the Sun.
In terms of interstellar travel, which involves traveling between stars, we are still far from reaching near-light speeds. The speed of light in a vacuum is approximately 186,282 miles per second (299,792 kilometers per second). According to our current understanding of physics, it is not possible for objects with mass to reach or exceed the speed of light.
However, there are theoretical propulsion concepts, such as the concept of "warp drives" or the potential use of advanced propulsion technologies like nuclear propulsion or ion propulsion, that have been proposed as potential means to achieve faster space travel in the future. These concepts are purely theoretical at this point, and significant technological advancements would be needed to realize them.
As technology continues to advance, it's possible that we may develop new propulsion systems and methods that could significantly increase the speeds at which we can travel in space. However, reaching speeds close to the speed of light or achieving practical interstellar travel still remain significant challenges that require further scientific and technological advancements.