You asked about Space Exploration
16 people built something like it. 16 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-04-29 | spaceinbrowser.com | gone |
| 2022-07-18 | pubkey.pm | gone |
| 2023-01-26 | onekb.uber.space | gone |
| 2022-07-24 | app.skillpress.io | gone |
| 2022-10-15 | mynotion.space | gone |
| 2022-03-10 | space4.cc | gone |
| 2022-02-11 | 50x50.space | gone |
| 2023-01-12 | getsleuth.xyz | gone |
| 2023-08-08 | allclues.ai | gone |
| 2021-02-25 | movement.fm | gone~20mo |
| 2023-06-10 | moonka.space | gone |
| 2022-03-02 | beta.backspace.eco | gone |
| 2021-08-06 | launch.orbital.chat | gone |
| 2021-12-22 | interviewer.space | gone |
| 2021-01-02 | podots.com | gone~27mo |
| 2021-07-21 | rocketcrew.space | gone |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.