ActivityPub Viewer

A small tool to view real-world ActivityPub objects as JSON! Enter a URL or username from Mastodon or a similar service below, and we'll send a request with the right Accept header to the server to view the underlying object.

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{ "@context": [ "https://www.w3.org/ns/activitystreams", { "ostatus": "http://ostatus.org#", "atomUri": "ostatus:atomUri", "inReplyToAtomUri": "ostatus:inReplyToAtomUri", "conversation": "ostatus:conversation", "sensitive": "as:sensitive", "toot": "http://joinmastodon.org/ns#", "votersCount": "toot:votersCount", "blurhash": "toot:blurhash", "focalPoint": { "@container": "@list", "@id": "toot:focalPoint" }, "Hashtag": "as:Hashtag" } ], "id": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443", "type": "Note", "summary": null, "inReplyTo": null, "published": "2025-02-23T02:07:50Z", "url": "https://mastodon.social/@SteveThompson/114050758747724443", "attributedTo": "https://mastodon.social/users/SteveThompson", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mastodon.social/users/SteveThompson/followers" ], "sensitive": false, "atomUri": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443", "inReplyToAtomUri": null, "conversation": "tag:mastodon.social,2025-02-23:objectId=928437198:objectType=Conversation", "content": "<p>An international research collaboration led by the University of Surrey&#39;s Nuclear Physics Group has overturned the long-standing belief that the atomic nucleus of lead-208 (²⁰⁸Pb) is perfectly spherical. </p><p><a href=\"https://phys.org/news/2025-02-unexpected-nucleus-prompts-reevaluation-atomic.html\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">phys.org/news/2025-02-unexpect</span><span class=\"invisible\">ed-nucleus-prompts-reevaluation-atomic.html</span></a></p><p>The discovery challenges fundamental assumptions about nuclear structure and has far-reaching implications for our understanding of how the heaviest elements are formed in the universe.</p><p><a href=\"https://mastodon.social/tags/NUCLEAR\" class=\"mention hashtag\" rel=\"tag\">#<span>NUCLEAR</span></a> <a href=\"https://mastodon.social/tags/PHYSICS\" class=\"mention hashtag\" rel=\"tag\">#<span>PHYSICS</span></a> <a href=\"https://mastodon.social/tags/THEORY\" class=\"mention hashtag\" rel=\"tag\">#<span>THEORY</span></a> <a href=\"https://mastodon.social/tags/PRESS\" class=\"mention hashtag\" rel=\"tag\">#<span>PRESS</span></a></p>", "contentMap": { "en": "<p>An international research collaboration led by the University of Surrey&#39;s Nuclear Physics Group has overturned the long-standing belief that the atomic nucleus of lead-208 (²⁰⁸Pb) is perfectly spherical. </p><p><a href=\"https://phys.org/news/2025-02-unexpected-nucleus-prompts-reevaluation-atomic.html\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">phys.org/news/2025-02-unexpect</span><span class=\"invisible\">ed-nucleus-prompts-reevaluation-atomic.html</span></a></p><p>The discovery challenges fundamental assumptions about nuclear structure and has far-reaching implications for our understanding of how the heaviest elements are formed in the universe.</p><p><a href=\"https://mastodon.social/tags/NUCLEAR\" class=\"mention hashtag\" rel=\"tag\">#<span>NUCLEAR</span></a> <a href=\"https://mastodon.social/tags/PHYSICS\" class=\"mention hashtag\" rel=\"tag\">#<span>PHYSICS</span></a> <a href=\"https://mastodon.social/tags/THEORY\" class=\"mention hashtag\" rel=\"tag\">#<span>THEORY</span></a> <a href=\"https://mastodon.social/tags/PRESS\" class=\"mention hashtag\" rel=\"tag\">#<span>PRESS</span></a></p>" }, "attachment": [ { "type": "Document", "mediaType": "image/jpeg", "url": "https://files.mastodon.social/media_attachments/files/114/050/755/271/455/220/original/929715ff4555a9f3.jpg", "name": "Mean values (points) and confidence regions corresponding to 1 σ (solid lines) and 2 σ (dotted lines) for the ⟨ 0 +1 | E3 | 3 −1⟩ and ⟨ 3 −1| E2 | 3 −1⟩ matrix elements (top), and the ⟨ 0 +1| E2 | 2 +1⟩ and ⟨ 2 +1| E2 | 2 +1⟩ matrix elements (bottom). Credit: Physical Review Letters (2025). DOI: 10.1103/PhysRevLett.134.062502", "blurhash": "UaQJcr~gD?V?RWt1Rnf5%JRos+kCo#obRkof", "focalPoint": [ 0.14, 0.17 ], "width": 800, "height": 530 } ], "tag": [ { "type": "Hashtag", "href": "https://mastodon.social/tags/nuclear", "name": "#nuclear" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/physics", "name": "#physics" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/theory", "name": "#theory" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/press", "name": "#press" } ], "replies": { "id": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443/replies?only_other_accounts=true&page=true", "partOf": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443/replies", "items": [] } }, "likes": { "id": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443/likes", "type": "Collection", "totalItems": 3 }, "shares": { "id": "https://mastodon.social/users/SteveThompson/statuses/114050758747724443/shares", "type": "Collection", "totalItems": 5 } }