In space Once at a constant cruise speed of about 16,150 mph (26,000 kph) in orbit, astronauts don't feel their speed any more than passengers on a commercial airplane. This really depends on what you mean by space. If you just want to orbit the Earth, you must reach speeds of at least 4.9 miles per second, or about 17,600 miles per hour. However, if you want to completely escape Earth's gravity and travel to another moon or planet, you must go even faster, at a speed of at least 7 miles per second or about 25,000 miles per hour.
Surprisingly, the record for the fastest manned mission still belongs to Apollo 10, which took place in May 1969.So, are you a fan of sci-fi movies or TV shows? Are you interested in complex physics and love the idea of traveling to distant planets and galaxies? Are you excited about the prospect of interstellar travel? Many of us dream of a future in which humans can travel anywhere in the universe. The correct answer depends on whether you're referring to manned or unmanned rockets and spaceships. Other billionaires, such as Jeff Bezos and Richard Branson, are also trying to build better, cheaper and faster rockets. In general, a conventional rocket has to go at about 17,000 miles per hour to reach orbit; also known as LEO (Low Earth Orbit).
Conventional rockets are generally designed to reach the speeds needed so that they can go where they need to go and not go much faster. The final model of the spacecraft will require six rocket engines and a standalone rocket called Super Heavy to reach orbit.