#planet9
Live, measured metrics for the hashtag #planet9 from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #planet9
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-10-01 01:35 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-10-01 01:35 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-10-01 01:35 UTCEverything below is measured over the latest 40 public posts (spanning ~23399 hours).
Posting hours (UTC) — busiest: 11:00
Languages: English (28) · German (7) · French (2) · Spanish (1) · Finnish (1) · Danish (1)
Avg boosts / post: 0.7
Top of the latest posts
[video] Astronomers discover a 4th sednoid in our Solar System. Ammonite, the “new” cosmic “fossil,” questions the entire theory about the hypothetical Planet 9. https://www.news-cafe.eu/?go=news&n=13714 #sednoid #planet9 #planetnine #solar
Projet participatif “Backyard Worlds: Planet 9” : des milliers de citoyens aident les astronomes à traquer la mystérieuse Planète 9 et à découvrir des objets inconnus comme des naines brunes. https://www.lesnumeriques.com/science-espace/pla
Un nouveau télescope au Chili pourrait enfin révéler la mystérieuse Planète 9 (pas Pluton), en scannant tout le ciel austral en quelques jours. https://www.mixvale.com.br/2026/04/28/un-nouveau-telescope-au-chili-pourrait-reveler-la-planete-
What “planet9” means
Wiktionary · Wikipediaplanet/ˈplænət/
- nounEach of the seven major bodies which move relative to the fixed stars in the night sky—the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn.
A planet is a large, rounded astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. The Solar System has eight planets by the most restrictive definition of the term: the terrestrial planets Mercury, Venus, Earth, and Mars, and the giant planets Jupiter, Saturn, Uranus, and Neptune. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula t
“Planet” on Wikipedia (CC BY-SA) →#planet9 across platforms
every network with a public tag surfaceFollow #planet9 straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/planet9