Suborbital flight refers to a trajectory that reaches space but does not complete an orbit around the Earth. This type of flight typically ascends to altitudes above 100 kilometers (62 miles), known as the Kármán line, which is the boundary of space. Suborbital flights are often used for scientific research, technology testing, and space tourism. During a suborbital flight, a spacecraft, such as those developed by Blue Origin or Virgin Galactic, experiences a brief period of weightlessness before descending back to Earth. These flights provide valuable data about the upper atmosphere and help advance the technology needed for future orbital missions.