Actually they are not anymore.
You might remember spacesuits used during the project Mercury to be shiny silver, but all spacesuits designed since the 60s have a flat white outer covering.
Retaining heat is not an issue in a spacesuit, quite the opposite. All the heat generated by the human body must be removed from the suit. All spacesuits have a cooling device built-in and there is very little if any ability to heat the suit. Usually there are little heaters in the fingertips but that's about it.
She wear's it because mammals can't breathe underwater.
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.
Think about it. A astronaut wears his suit up in space where gavity level is much lower than in earth. If you have a 160 lbs. suit and a 125 lbs. man the suit would be about 25 lbs. in space and the astronaut would still have his strength to hold up his earth weight, 125 lbs. so he could carry his suit easily.
A space suit.
Rocket man
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.
It's called a space suit
An astronaut.
Walter Cunningham is a astronaut so when he was in space he wore a space suit, but on earth he dresses just like you.
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.
An astronaut suit.
An astronaut must wear a pressurized suit in space to protect against the vacuum of space, which lacks oxygen and has extremely low pressure. The suit maintains a stable internal environment, providing breathable air and regulating temperature. Additionally, it shields astronauts from harmful radiation and micrometeoroids. Without this protection, human life would be unsustainable in the harsh conditions of outer space.
fabric
The pressure gauge on a space suit is used to monitor and maintain the correct pressure inside the suit to ensure that the astronaut is protected from the vacuum of space. It helps regulate the suit's internal environment and ensures the astronaut can breathe and move properly.
the suit of astronaut
She wear's it because mammals can't breathe underwater.
The suit allows the person to walk in outer space, because the suit is designed to with stand the extreme heat and cold of outer space.