Arecibo Observatory

Ground-based · 1963 · Arecibo, Puerto Rico

Type: Ground-based
Location: Arecibo, Puerto Rico
Altitude (m): 498
Founded: 1963

Notes

A 305 m dish slung across a natural sinkhole. It sent the 1974 interstellar message and found the first exoplanets; the platform collapsed into the dish in December 2020.

Discoveries [DB]

The Binary Pulsar

Referenced by

discovery

The Binary Pulsar

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.