SOLAR SYSTEM

Detailed explanation-1: -The short answer is the astronauts and cosmonauts (that means a Russian astronaut) bring oxygen from Earth, and they make oxygen by running electricity through water (this is called electrolysis).

Detailed explanation-2: -Above the 63, 000-foot threshold, humans must wear spacesuits that supply oxygen for breathing and that maintain a pressure around the body to keep body fluids in the liquid state. At this altitude the total air pressure is no longer sufficient to keep body fluids from boiling.

Detailed explanation-3: -Astronauts can survive in their spacesuits as long as the oxygen tanks allow them to continue breathing. The two oxygen tanks and the emergency oxygen supply in current EMU suits collectively contain 6.5 to 8 hours (+ 30 minutes) worth of oxygen.

Detailed explanation-4: -The ISS is constructed of many connected modules called “nodes” connecting the station together. The solar arrays are connected to the station with a long truss, which controls the space station’s temperature. The ISS also has robotic arms mounted outside the station.

Detailed explanation-5: -Because there is nothing out in space (like an atmosphere), the sound waves from one astronaut’s whistling can’t travel over to the other astronaut’s ears. That’s why the astronauts use radios to communicate-even if they’re floating in space right next to each other!