抬头看看，再低头看看这个页面。这里的每件仪器都是一个小小的实时模型，展现此刻正在你上方发生的事情——昼夜分界线掠过地球、八千颗卫星沿真实轨道运行、磁层随今日太阳风而扭动变形。天空，化作一张运行中的图解。
一颗由真实太阳照亮的实时地球。昼夜分界线跟随真实的 UTC 时间；城市灯火在夜半球闪烁；云层在地表上方飘移；大气层的蓝色光晕环抱着地平边缘。
8000 多颗在役卫星，环绕三维地球沿由 TLE 实时推算的轨道运行；点击任意光点可查看名称、NORAD 编号、高度与周期；可按星座筛选。
地球的偶极磁力线与磁层顶，由 NOAA SWPC 太阳风数据实时塑形；南向 Bz 会触发一段示意性的磁重联动画。采用偶极近似与 Shue 1997 模型。
将 OpenSky 中每一架在飞的飞机化作三维地球上的实例化光点，每架拖曳约 3 分钟逐渐消散的凝结尾迹，在两次实时定位之间以航位推算补全。
Why the ocean bulges twice — the Moon and Sun stretch the seas by gravity, and their alignment swings the tide between spring and neap.
A clockwork Solar System where all eight planets ride their true ellipses at the correct relative speeds — Mercury sprinting, Neptune crawling — solved live from real Keplerian elements.
A live planetarium: pick a place and a moment, and the brightest stars wheel about the celestial pole with their constellations drawn in.
A physically-lit 3D Moon whose terminator and illuminated fraction are computed from the real Sun–Earth–Moon geometry for any date — scrub time and watch the maria slide under the shifting light.
Three planets trace true ellipses around the Sun while the swept-area and harmonic laws come alive on screen.
The Hertzsprung–Russell diagram drawn live: a whole stellar population scatters into the main sequence, the red-giant branch and the white-dwarf graveyard, and you can watch a star of any mass trace its evolutionary track across it.
Steer the Moon through its tilted orbit and watch shadow cones line up the Sun, Earth and Moon into total, annular and lunar eclipses.
把每一次 SpaceX 飞行化作一座任务控制台——可滚动的飞行日志，标注成功与失败，配有实时成功率仪表，以及每次发射的任务徽章与链接档案。
八大行星依开普勒轨道要素环绕太阳运行；在“美观”的夸张比例与真实比例模式之间切换，亲身感受太空究竟有多空旷。