Washington: Many people wonder what would happen if astronauts face an emergency while they are in space. Unlike what is often shown in movies, the United States space agency NASA does not keep a separate emergency rescue rocket ready to save astronauts.
Experts say the main reason is that preparing a rescue mission in advance is extremely complex and expensive. A rescue spacecraft would need a rocket, trained crew, mission control teams and launch facilities ready at all times. Maintaining such a system permanently would require huge resources and careful coordination.
Instead of relying on a last minute rescue launch, NASA designs missions so astronauts always have a safe way to return to Earth. For missions to the International Space Station, the spacecraft that carries the astronauts to orbit remains docked to the station throughout their stay.
This vehicle acts as a lifeboat in case of an emergency. If there is a serious problem such as a medical issue, fire or technical failure, astronauts can quickly board the spacecraft and return to Earth.
Spacecraft such as the SpaceX Crew Dragon and the Russian Soyuz are currently used for this purpose. These vehicles remain attached to the station and are regularly checked to make sure they are ready for an emergency return.
Scientists also point out that launching a rescue mission after an emergency would take a long time. Preparing rockets, arranging a crew and waiting for the right launch conditions could take weeks or even months. Because of this, a quick rescue from Earth is not considered practical.
Recent events have shown how the current system works. In one case, astronauts on the International Space Station returned to Earth earlier than planned due to a medical issue using their docked spacecraft. In other situations, replacement crews arriving at the station have allowed astronauts who were delayed to return safely.
However, experts say future missions to the Moon or Mars may bring new challenges. Astronauts traveling much farther from Earth will not have the same quick return options available at the space station.
Space agencies are now studying new safety systems for deep space missions. These include backup spacecraft, improved life support systems and advanced medical support that can operate far away from Earth.
For now, NASA believes that keeping a return spacecraft docked with astronauts is the safest and most reliable way to deal with emergencies in space.