astro.tdg/core/templates/header.html

<header>
  <div>
    <h1><a href="{% url 'core:homepage' %}">Astronomy Base by The Dazed Gerbil</a></h1>
  </div>
  <div>
    <nav>
      <a href="{% url 'core:homepage' %}">Home</a>
      <a href="{% url 'news:list' %}">News</a>
    </nav>
  </div>
</header>