About
No black box.
任务 control for the sky above you — built so that every number on this site can be traced back to a source and a formula.
Launch schedule
From Launch Library 2, the open database maintained by The Space Devs. It is fetched at build time and baked into the pages, because the API sends no CORS header and a browser cannot call it directly. Countdowns are then computed against your own clock, so they stay correct as long as your device clock is.
空间站 position
Live from wheretheiss.at, refreshed every few seconds while you keep the page open.
月亮, planets, day–夜 line
由你的浏览器计算： astronomy-engine (MIT licence). Nothing about your location is sent to us — the calculation happens on your device.
Map
Land outlines from Natural 地球 (public domain), projected equirectangularly. The 夜 region is derived from the instantaneous 太阳直射点, so it drifts west through the day exactly as it should.
我们不要求注册，也不保存你的坐标。点「使用我的位置」时浏览器会问你，答案只存在你自己浏览器的本地存储里，只用于算地平高度。
这一页没有统计脚本——没有客户端埋点、没有 cookie、没有第三方请求。托管方保留任何网站服务器都会有的普通访问日志（IP、路径、UA、来源），我们报流量数字用的就是它。与其装个埋点再假装没有，不如直说。
Contact
萌石科技（北京）有限公司
京ICP备17060859号
这是什么、不是什么scope, stated plainly
It is
One screen for the question “what is worth looking at tonight”: the next launch, where the station is 就在眼前, the moon, the planets that clear the horizon, and the passes you could actually see — for 60 cities and for your own coordinates, computed from public data at build time.
It is not
卫星目录。我们跟踪 three objects — the 空间站, 天宫 and 哈勃 — because those are the ones a person can plausibly see with their own eyes. If you need 30,000 objects, debris or brightness magnitudes, use Heavens-Above, N2YO or azmth; they are better at it and have been for years.
Self-check historythe gates, published
上次运行 2026-10-29 08:14 — green. The gates check internal links, unique titles and descriptions, that the key numbers are in the HTML without JavaScript, that the live site equals the build, that the share cards are complete, and that each gate fails when the site is deliberately broken.
Measured traffic我们自己的数字，公开
测量于 2026-10-29 07:56 UTC，覆盖最近 1 天，来自 3 个访问日志文件(s). Reads are GET/HEAD after user-agent bot exclusion and after removing our own IPs (of 9,601 raw requests in this window); deploys are PUTs and are separated out so they cannot be mistaken for traffic.
Of those, 5 distinct sessions (0 of which opened more than one page). One page plus its assets is what a link-preview or scanner fetcher looks like; a person usually clicks something.
我们不装统计脚本。这些数字来自托管方的普通访问日志——每个网站服务器都有。数字不好看，它也是这个数字。
Start with the console
一屏之内：发射倒计时、空间站位置、月亮与行星。