Advancements in rocket engineering have significantly reduced the time needed for space travel and made it more attainable. Reaching the Kármán Line—the defined edge of space located 100 kilometers above Earth—now takes only about 2 to 3 minutes with rockets like Blue Origin's New Shepard. This was demonstrated during its latest flight on April 14, 2025, which carried an all-female crew, including Katy Perry and Lauren Sánchez, on an 11-minute suborbital journey.
Traveling to low Earth orbit, such as to the International Space Station (ISS) situated about 420 kilometers above Earth, can take anywhere from 4 hours to 3 days. The duration depends on the specific spacecraft and mission plan. For example, Russia’s Soyuz can dock with the ISS in approximately six hours, while other missions may take longer due to technical constraints or safety procedures.
The velocity required to access space varies depending on the mission’s destination. To maintain orbit around Earth, a rocket must achieve speeds close to 28,000 km/h. However, escaping Earth’s gravitational pull entirely, such as for a mission to Mars, requires a higher speed—around 40,000 km/h.
Reaching the Moon generally takes about three days, as was typical during the Apollo missions. In contrast, a mission to Mars may last between 6 to 9 months, depending on the flight path and planetary alignment. Traveling even farther, like to Neptune, could take up to 12 years, as evidenced by the Voyager 2 probe.
Ongoing innovations in propulsion systems and space mission strategies continue to cut down travel times. With the growing involvement of private companies like SpaceX and Blue Origin alongside government agencies, space exploration is becoming more cost-effective and accessible, opening doors to tourism, scientific discovery, and even potential colonization of other planets.
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