The speed at which we are traveling through space depends on the frame of reference we choose. In terms of our motion within the Solar System, the Earth orbits the Sun at an average speed of about 30 kilometers per second (18.6 miles per second) or roughly 107,000 kilometers per hour (66,500 miles per hour).
However, our Solar System is itself in motion within the Milky Way galaxy. The Milky Way is rotating, and our Sun, along with the Earth and other planets, orbits around the galactic center. This motion adds an additional velocity. The Sun's speed relative to the center of the Milky Way is estimated to be around 220 kilometers per second (137 miles per second).
When it comes to interstellar distances, the vastness of space makes travel to other planets or stars incredibly challenging with our current technology. The time it would take to reach another planet or star depends on various factors, including the distance to the destination, the speed of the spacecraft, and the propulsion technology used.
For example, the closest star system to our Solar System is Alpha Centauri, located about 4.37 light-years away. If we were to travel at the speed of light, which is approximately 299,792 kilometers per second (186,282 miles per second), it would take about 4.37 years to reach Alpha Centauri. However, achieving such speeds is beyond our current technological capabilities.
With our existing spacecraft technology, it would take many years or even centuries to reach even the closest star systems. The Voyager 1 spacecraft, for instance, launched in 1977 and is currently the farthest man-made object from Earth, but it would still take tens of thousands of years to reach the nearest stars.
Efforts are underway to develop faster propulsion systems and explore concepts like nuclear propulsion or breakthrough technologies such as laser propulsion or ion drives. However, practical interstellar travel remains a significant challenge and is the subject of ongoing scientific and engineering research.