What is a Star? A star is a giant ball of very hot __ mainly hydrogen and helium.It is held together by a force called __ Stars go through a process called __ fusion. Stars in the sky differ in __ and temperature. What is a constellation? A constellation is a group of visible stars that form a __ when viewed from Earth. The stars we see In a constellation are very __ from us. Constellations appear to move but that is only because the Earth __ Scientists divided the sky into __ different constellations.

## Step 1<br />The first part of the question asks for the definition of a star. A star is a celestial body that is primarily composed of hydrogen and helium. The force that holds a star together is gravity.<br /><br />## Step 2<br />The second part of the question asks about the process that stars undergo. This process is known as nuclear fusion, where hydrogen atoms combine to form helium, releasing a large amount of energy.<br /><br />## Step 3<br />The third part of the question asks about the characteristics of stars in the sky. Stars in the sky differ in size and temperature.<br /><br />## Step 4<br />The fourth part of the question asks for the definition of a constellation. A constellation is a group of visible stars that form a pattern when viewed from Earth.<br /><br />## Step 5<br />The fifth part of the question asks about the distance of stars from Earth. The stars we see in a constellation are very far from us.<br /><br />## Step 6<br />The sixth part of the question asks about the apparent movement of constellations. Constellations appear to move, but this is only because the Earth rotates.<br /><br />## Step 7<br />The seventh part of the question asks about the number of constellations. Scientists have divided the sky into 88 different constellations.