<div class="header">Our Solar System</div>
or even
<div class="header"><h1>Our Solar System</h1></div>
<h1>Our Solar System</h1>
<div class="basketball">
<ul>
<li>Mark Few</li>
<li>Roy Williams</li>
<li>Thad Matta</li>
...
<ul class="basketball">
<li>Mark Few</li>
<li>Roy Williams</li>
<li>Thad Matta</li>
...
Copyright © David Heitmeyer