#Ultrablack
Live, measured metrics for the hashtag #Ultrablack from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #ultrablack
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 · mas.to (Mastodon public tags API) · fetched 2026-10-11 11:29 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mas.to (Mastodon public search API) · fetched 2026-10-11 11:29 UTCLive pulse
measured · mas.to (Mastodon tag timeline) · fetched 2026-10-11 11:29 UTCEverything below is measured over the latest 11 public posts (spanning ~20265 hours).
Posting hours (UTC)
Languages: English (10)
Avg boosts / post: 0.8
Top of the latest posts
🎨🛰️ Ah, the University of Surrey has discovered that the latest goth satellite fashion trend is "ultra-black" to save us from celestial glare. Meanwhile, their website is a cookie-monster that gobbles your #consent faster than a satellite
Study: ultra-black coating could reduce satellite light pollution https://www.surrey.ac.uk/news/astrophysicists-show-how-worlds-darkest-coating-could-protect-night-sky-satellite-light-pollution Comments: https://news.ycombinator.com/item?id
This light absorption is in the visible spectrum. The absorbed light is emitted as infra-red. "Making synthetic ultrablack materials tends to be expensive and requires the use of toxic substances, such as carbon nanotubes. But the black fea
#ultrablack across platforms
every network with a public tag surfaceFollow #ultrablack 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/ultrablack