Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time.

Earth is the third planet from the Sun in our solar system and the only known celestial body to support life.

The International Space Station (ISS) is a habitable space station that serves as a laboratory for scientific research and international cooperation.

A spacecraft is a vehicle designed to travel in outer space.

A space station is a large spacecraft that remains in low Earth orbit for extended periods of time.