Eridanus

Eridanus can refer to:


 * Eridanus sector - A UNSC-controlled sector of space.
 * Eridanus system - A UNSC Outer Colony system.
 * Eridanus II - A colony world in the Eridanus system.
 * Eridanus Secundus - An asteroid colony in the Eridanus system's asteroid belt.
 * Epsilon Eridani system - One of the closest inner colony systems to Earth, home to several human colonies, most notably Reach.
 * Eridanus rebels - A human terrorist/paramilitary faction based in the Eridanus system.
 * Assault on Eridanus Secundus - The first mission undertaken by the SPARTAN-IIs.
 * Massacre at Eridanus Secundus - An engagement at Eridanus Secundus in 2552.