How Does The Most Extreme Temperatures in the Universe Work?

The most extreme temperatures in the universe are like the hottest and coldest places you can imagine, even hotter than a summer day in the desert or colder than a winter night outside your house.

Space is empty, but that doesn’t mean it’s calm. In some parts of space, things happen so fast and with such energy that they create extreme heat. It's like when you rub your hands together really fast, they get warm because of the motion. In space, stars are like giant rubbing hands, burning up to millions of degrees.

On the other side of the temperature scale, there’s deep space, which is almost completely empty and very still. It's like being in a freezer that never stops working, so cold it can bring things to a stop. Some parts of space are so cold they’re called "near absolute zero," meaning they're as close to no heat as you can get.

Just like how you feel the difference between hot soup and ice cream, these extreme temperatures in the universe make everything around them either super active or totally still, it's a big difference!