Oort Cloud

Local · 3.2 ly

Coordinates: origin — we are inside it
RA (deg): 0
Dec (deg): 0
Within: Local Interstellar Cloud
Recognised: 1950
Population: perhaps a trillion comets
Size (ly): 3.2
Kind: Local

Notes

A shell of icy bodies half way to the nearest star, inferred entirely from where long-period comets come from — nothing in it has ever been seen directly.

Open on the The Ladder of Scale shelf — the interactive card, the filters, and everything alongside it.

From the Cosmic Structures database in Notion, last edited 2026-08-21. This page is the row, rendered by the build; nothing on it is written by hand.