an astronaut.
Because sound needs particles to travel through ; when a sound from inside one helmet is made, the particles vibrate the surrounding particles therefore vibrating the other astronauts helmet particles ( as they are touching) allowing him to hear the sound.
Right now, Astronauts and Cosmonauts live inside the space station that orbits Earth.
because of unavailability of gravity.
Everyone needs to be protected against radiation, because radiation in strong doses can Kill or injure. A small amount that a person receives in an x-ray will do no harm; but, too strong a dose of radiation is very dangerous. Radiation is greater in outer space than it is on the earth, because, we are protected from radiation on earth by the atmosphere. Astronauts in outer space have no such protection.
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Astronauts' visors are coated in a thin layer of gold to protect their eyes from harmful radiation and to help regulate the temperature inside the helmet.
To breath oxygen.
An astronaut's helmet is called a space helmet or spacesuit helmet. It is a crucial component of an astronaut's spacesuit as it provides oxygen and protection in the vacuum of space.
Anti-fog coatings are applied to the inside surface of the astronaut's helmet visor to prevent fogging. Additionally, proper ventilation and air circulation inside the helmet help reduce humidity and condensation buildup. Astronauts may also use anti-fog wipes or solutions as needed during a spacewalk.
it will cost £500,000 because i have bought one;)
Molybdenum
A space helmet provides a sealed environment for astronauts, protecting them from the vacuum of space, extreme temperatures, and harmful radiation. It also provides a supply of oxygen for breathing and helps regulate temperature and pressure inside the helmet to keep the astronaut safe and comfortable during spacewalks or extravehicular activities.
Because sound needs particles to travel through ; when a sound from inside one helmet is made, the particles vibrate the surrounding particles therefore vibrating the other astronauts helmet particles ( as they are touching) allowing him to hear the sound.
NASSS
Yes, albeit a very very expensive one.
Astronauts wear helmets primarily for life support and protection. The helmet provides a supply of oxygen and removes carbon dioxide, ensuring they can breathe in the vacuum of space. Additionally, it protects them from micro-meteoroids, radiation, and extreme temperatures. The helmet also contains communication systems, allowing astronauts to communicate with each other and mission control.
astronauts wear special suits which protect them from the heat