LIGO

Ground-based · 2002 · Hanford, Washington and Livingston, Louisiana

Type: Ground-based
Location: Hanford, Washington and Livingston, Louisiana
Altitude (m): 142
Founded: 2002

Notes

Two 4 km interferometers measuring length changes of about a ten-thousandth the width of a proton. Two sites, because a real signal must arrive at both.

Discoveries [DB]

Gravitational Waves A Neutron Star Merger, Seen and Heard

Referenced by

discovery

A Neutron Star Merger, Seen and Heard Gravitational Waves

Open on the Cosmic Exploration shelf — the interactive card, the filters, and everything alongside it.

From the Observatories database in Notion, last edited 2026-08-15. This page is the row, rendered by the build; nothing on it is written by hand.