Questions about space suits.

 1. Why is a cooling system necssary?

Because inside the space suit is a ontained atmosphere and withou a cooling system, the astronaut could overheat from his own body heat.

2. How do astronauts deal with sun in their eyes?

The visors on their spacesuits have a coating on them to protect against uv light and strong, unflitered rays from the sun. That's why you can't see the astronaut's face, usually.

The visors are made from polycarbonate plastic with a thin layer of gold. This blocks out most rays because it's so dense. Lead is also dense, but we can't use that, for obvious reasons.

3.  Why is a space suit needed in space?

I don't know, maybe: Unfiltered sunlight, uv rays, solar wind, debris flying past faster than a motorbike, extreme temerature changes from 255 degrees celsius to -145 degrees celsius, or even just the fact that there is no oxygen, or no anything really, in the void of space, so all your organs will be sucked out due to the fact that you will have air in your lungs as you exit the spaceship. You'll then become a floating corpse, drifted off into spae, getting cooked by the extreme heat of the solor rays, not filteded by the atmosphere, then deep frozen once you go into shade. Lovely.

4. Why are tools and equipmet tethered to the astronaut?

Because if they're not, they'll go drifting off into space, as there's no gravity to hold them down.

5.  What safety measures are taken to keep the astronaut safe?

Make sure they're in a space suit, make sure the space suit is functioning properly, keep them tethered to the spaceship, because theres no way to get back to it if you drift away, and most importantly, keep them focused.