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。
Assemble a multi-stage rocket from engines, tanks and a nose cone, then fly it to the Kármán line — live throttle, pitch and staging against real thrust, gravity and drag.
基于实时 TLE 推算的三维地球，自动找出仍以单列编队飞行的最新一批星链发射——即「列车」——并在变暗的星座背景上将其点亮，同时显示星下点轨迹与轨道参数。
A 3D Earth wrapped in tracked orbital debris from the great fragmentation events — Fengyun-1C, Iridium-33, Cosmos-2251 — propagated live with satellite.js and colored by source event, telling the Kessler-syndrome story shell by shell.
A live view of the Sun straight from NASA’s Solar Dynamics Observatory — switch wavelengths to peel back the corona, the chromosphere and the magnetic field.
A live gallery of raw Mars rover photographs — pick a rover, scrub through the Martian sols and cameras, and watch the surface arrive frame by frame.
A live readout of the wind blowing off the Sun — real-time speed, density, and the interplanetary magnetic field from NOAA, read for storm level and aurora odds as a southward Bz pries the magnetosphere open.
A live board of asteroids skimming past Earth — each plotted by how close it passes and how big it is, straight from NASA’s close-approach feed.
一款实时浏览所有已确认系外行星的工具——以半径对轨道周期作图，按发现方法着色，数据直接来自 NASA 系外行星档案。
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。
A 3D fly-through of the Sun’s local stars — the nearest and brightest suns within fifty light-years, coloured by spectral class and ringed by distance shells.
Trace the stick-figures of 36 constellations and read the Greek and world myths behind each pattern of stars.
Watch a planet cross its star and carve the tiny dip in brightness that lets astronomers detect worlds light-years away.
Why the ocean bulges twice — the Moon and Sun stretch the seas by gravity, and their alignment swings the tide between spring and neap.
Pick a star’s birth mass and watch its whole life play out — a marker tracing its track across the HR diagram while the star itself swells, puffs and dies, with the fate (white dwarf, neutron star or black hole) and the wildly mass-dependent lifetime set by real scaling laws.
A smooth logarithmic flight through 62 orders of magnitude — from the Planck length past quarks, DNA, humans, Earth, the Sun, the Milky Way, all the way to the edge of the observable universe.
Thousands of icy ring particles ride Keplerian orbits around Saturn — and the Cassini Division opens exactly where the 2:1 resonance with the moon Mimas clears them, while Pan herds the Encke gap shut.
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.
The year’s great meteor showers, made watchable: streaks rain outward from each shower’s radiant, with peak rates and active windows laid across the calendar.
You never see the universe as it is now — only as it was when the light left; watch a pulse crawl outward at c and feel how deep the past you are looking into.
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.
Climb the cosmic distance ladder rung by rung — radar in the solar system, the parallax wobble of nearby stars, pulsating Cepheids and Type Ia supernovae as standard candles, and Hubble’s law to the edge of the visible universe — each method calibrating the next across more than twenty orders of magnitude.
Thousands of asteroids ride Keplerian orbits between Mars and Jupiter — and the Kirkwood gaps open up exactly at the mean-motion resonances where Jupiter clears them.
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。