H.O.R.I.Z.O.N. (Hardware for OneHanded Retention in ZeroGravity Operations and Navigation) is an Oklahoma State University undergraduate team selected for NASA 2026 Micro-g NExT Challenge. Official OSU reporting documents its passive capture tool dock for astronaut EVA tools, design, testing, and outreach subgroups, 3D-printed prototypes that passed initial strength tests, planned full-scale and Neutral Buoyancy Laboratory testing, and STEM outreach; no NASA adoption or flight claim is made.