An astronaut.
Yuri Gagarin
An astronaut suit.
She wear's it because mammals can't breathe underwater.
This depends upon where the astronaut is. Inside the International Space Station, astronauts usually wear light, informal clothing. If the astronaut exits the station to do a space walk or other such mission, the astronaut will wear an air tight space suit, in order to be able to continue breathing.
when they go in space there is no gravity. no gravity makes you lighter that is how an astronaut can wear a suit that is heavier than them
you can on earth but you would have to wear a astronaut suit with oxygen to breathe because there is no oxygen in the atmosphere
If he took a monkey with him, presumably for scientific purposes, it would need to wear a suit just like the astronaut so it could breath and be protected from space.
Walter Cunningham is a astronaut so when he was in space he wore a space suit, but on earth he dresses just like you.
It's called a space suit
no
For Multiple reasons. 1) There is no air, therefore the astronaut must wear the suit, or rather the suit's helmet to breathe. 2) It protects him from physical damage when handling volatile or dangerous substances/ objects.
fabric
James Miller