Experimental browser for the Atmosphere
But if you say, "What was Earth like 133 years ago, *at the same time* as light left HR 8799?" that "At the same time" part is a trap. You can't really have "at the same time" across interstellar distances. Might seem like semantics, but things like gravitational lensing wouldn't work otherwise.
May 8, 2025, 12:38 PM
{ "uri": "at://did:plc:mlabzvj2dn2ynqufgidmh2i4/app.bsky.feed.post/3lonwl664vk2q", "cid": "bafyreicoimw53ly7scbimdin6ufvznfcfwgavndkp6uczb5ayb4ygj72fu", "value": { "text": "But if you say, \"What was Earth like 133 years ago, *at the same time* as light left HR 8799?\" that \"At the same time\" part is a trap. You can't really have \"at the same time\" across interstellar distances. Might seem like semantics, but things like gravitational lensing wouldn't work otherwise.", "$type": "app.bsky.feed.post", "langs": [ "en" ], "reply": { "root": { "cid": "bafyreidqcgkflq7th35civad6xvvgux5wtqojrpsemrbxt7kxvdnzezmry", "uri": "at://did:plc:wwbktud2d34ont3frkv73pjo/app.bsky.feed.post/3lom6n44oh22j" }, "parent": { "cid": "bafyreiedqffcrrbtx5zegqoweo7pm273icb4r2na7bzuwwqwohy6wcew3a", "uri": "at://did:plc:mlabzvj2dn2ynqufgidmh2i4/app.bsky.feed.post/3lonwl5yn4k2q" } }, "createdAt": "2025-05-08T12:38:59.284Z" } }