Of the following parts of the Sun, which is the hottest? sunspots corona photosphere supergranules

## Step 1<br />The Sun is composed of several parts, each with different temperatures. The options provided are sunspots, corona, photosphere, and supergranules.<br /><br />## Step 2<br />Sunspots are regions on the Sun's surface that are cooler than their surroundings. They are not the hottest part of the Sun.<br /><br />## Step 3<br />The photosphere is the visible surface of the Sun, and it is cooler than the corona.<br /><br />## Step 4<br />Supergranules are large cells of convection on the Sun's surface, and they are also cooler than the corona.<br /><br />## Step 5<br />The corona is the outermost layer of the Sun's atmosphere, and it is the hottest part of the Sun. The temperature of the corona can reach up to 1.5 million degrees Celsius.