And so on. It sets up a cycle, as shown in Figure 1 . This cycle transports heat from the stove up to the air. It turns out that convection is an excellent way to move heat from one place to another. Stars and planets use this kind of cycle to get heat from the inside out.
Heat loss is the biggest problem that stars and planets face.
Inside stars and planets, it's hot. The heat has to escape somehow. There are three ways how. When you put your hand against a cold window on a winter's day, the window sucks the heat from your hand by conduction. Second, heat can move by radiation .