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 Eridanus system's asteroid belt.
 * Epsilon Eridani system - home to humanity's most important colonies.
 * Eridanus rebels, a human terrorist/paramilitary faction based in the Eridanus system.
 * Assault on Eridanus Secundus - the first mission of the SPARTAN-IIs.
 * Massacre at Eridanus Secundus - an engagement at Eridanus Secundus in 2552.