\n\n.int-nav{position:sticky;top:0;background:rgba(4,6,15,.95);backdrop-filter:blur(14px);border-bottom:.5px solid rgba(255,255,255,.08);padding:.9rem 2rem;display:flex;align-items:center;gap:1rem;z-index:10}\n.int-logo{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:\n.int-back{margin-left:auto;background:rgba(255,255,255,.06);border:.5px solid rgba(255,255,255,.08);border-radius:8px;padding:.4rem .9rem;font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:\n.int-back:hover{color:\n.int-hero{padding:3.5rem 2rem 1rem;text-align:center}\n.int-hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:300;letter-spacing:-.02em}\n.int-hero h1 span{color:\n.int-hero p{margin-top:.5rem;color:\n.int-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:1.5rem;padding:2rem 2rem 6rem;max-width:900px;margin:0 auto}\n.int-card{background:rgba(255,255,255,.03);border:.5px solid rgba(255,255,255,.08);border-radius:18px;overflow:hidden;cursor:pointer;transition:all .3s;display:flex;flex-direction:column}\n.int-card:hover{transform:translateY(-5px);border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.06)}\n.int-card-preview{height:200px;position:relative;overflow:hidden;flex-shrink:0}\n.int-card-preview canvas{width:100%;height:100%;display:block}\n.int-card-body{padding:1.4rem 1.6rem 1.6rem;flex:1;display:flex;flex-direction:column;gap:.5rem}\n.int-card-tag{font-family:'Space Mono',monospace;font-size:8px;letter-spacing:.14em;text-transform:uppercase}\n.int-card-title{font-size:1.3rem;font-weight:300;color:\n.int-card-desc{font-size:12.5px;color:\n.int-card-cta{display:inline-flex;align-items:center;gap:.5rem;margin-top:.8rem;padding:.55rem 1.2rem;border-radius:8px;font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;transition:all .2s;align-self:flex-start;border:.5px solid}\n\n

\n ⚡\n Interactives\n \n

Space Interactives

Hands-on experiences that put you in the universe — not just reading about it.

\n \n

Scale of the Universe

Drag a slider to zoom from an atomic nucleus all the way out to interstellar space. Watch the universe shrink in real time — from protons to planets to the Oort Cloud, one scroll at a time.

\n \n

Solar System Flight

Pilot a spaceship through our solar system. Visit every planet, manage your fuel, feel the Sun's gravity pull as you orbit, and boost with Shift to make the long haul out to Neptune.

\n\n\n

\n\n.zoom-nav{position:absolute;top:0;left:0;right:0;z-index:20;background:rgba(2,4,8,.85);backdrop-filter:blur(14px);border-bottom:.5px solid rgba(255,255,255,.07);padding:.8rem 1.5rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}\n.zoom-title{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:\n.zoom-hint{font-family:'Space Mono',monospace;font-size:9px;color:\n.zoom-back{margin-left:auto;background:rgba(255,255,255,.06);border:.5px solid rgba(255,255,255,.1);border-radius:7px;padding:.35rem .9rem;font-family:'Space Mono',monospace;font-size:10px;color:\n.zoom-back:hover{color:\n/* bottom HUD */\n.zoom-hud{position:absolute;bottom:0;left:0;right:0;z-index:20;background:rgba(2,4,8,.88);backdrop-filter:blur(14px);border-top:.5px solid rgba(255,255,255,.07);padding:.8rem 2rem 1.2rem;display:flex;flex-direction:column;gap:.6rem}\n.zoom-hud-top{display:flex;align-items:center;gap:2rem}\n.zoom-info{flex:1}\n.zoom-name{font-size:1.3rem;font-weight:300;min-height:1.6rem}\n.zoom-desc{font-size:11px;color:\n.zoom-scale-badge{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.1em;color:\n.zoom-slider-row{display:flex;align-items:center;gap:.8rem}\n.zoom-slider{-webkit-appearance:none;flex:1;height:5px;border-radius:3px;outline:none;cursor:pointer;background:linear-gradient(to right,\n.zoom-slider::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:\n.zoom-slider-label{font-family:'Space Mono',monospace;font-size:8px;color:rgba(255,255,255,.25);white-space:nowrap}\n/* vertical milestone bar on right */\n.zoom-milestones{position:absolute;right:16px;top:56px;bottom:130px;z-index:20;display:flex;flex-direction:column;justify-content:space-between;pointer-events:none}\n.zoom-ms{font-family:'Space Mono',monospace;font-size:8px;letter-spacing:.08em;color:rgba(255,255,255,.18);text-align:right;padding:.2rem .4rem;border-right:1px solid rgba(255,255,255,.1);transition:color .3s,border-color .3s}\n.zoom-ms.active{color:\n\n

\n 🔭\n Scale of the Universe\n Scroll · pinch · or use arrow buttons to zoom\n \n

Atomic Nucleus

Protons & neutrons packed in the nucleus

0.000001 nm

\n NUCLEUS\n \n INTERSTELLAR\n

\n\n\n\n

Score: 0

\n \n

Explore the solar system

\n W / ↑ Thrust forward
\n A / ← Rotate left
\n D / → Rotate right
\n S / ↓ Brake
\n SHIFT Boost (uses 3× fuel)
\n R Refuel (near planet)\n

\n\n\n

\n\n.arc-nav{position:sticky;top:0;background:rgba(4,6,15,.95);backdrop-filter:blur(14px);border-bottom:.5px solid rgba(255,255,255,.08);padding:.9rem 2rem;display:flex;align-items:center;gap:1rem;z-index:10;flex-wrap:wrap}\n.arc-logo{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:\n.arc-back{margin-left:auto;background:rgba(255,255,255,.06);border:.5px solid rgba(255,255,255,.08);border-radius:8px;padding:.4rem .9rem;font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:\n.arc-back:hover{color:\n.arc-hero{padding:3.5rem 2rem 1.5rem;text-align:center}\n.arc-hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:300;letter-spacing:-.02em}\n.arc-hero h1 span{color:\n.arc-hero p{margin-top:.5rem;color:\n.arc-filters{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;padding:.8rem 2rem 1.2rem}\n.arc-filter{background:rgba(255,255,255,.05);border:.5px solid rgba(255,255,255,.1);border-radius:20px;padding:.3rem .9rem;font-family:'Space Mono',monospace;font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:\n.arc-filter:hover,.arc-filter.active{background:rgba(74,222,128,.15);border-color:rgba(74,222,128,.4);color:\n.arc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.2rem;padding:0 2rem 6rem;max-width:1200px;margin:0 auto}\n.arc-card{background:rgba(255,255,255,.03);border:.5px solid rgba(255,255,255,.08);border-radius:14px;overflow:hidden;cursor:pointer;transition:all .25s;display:flex;flex-direction:column}\n.arc-card:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.18);background:rgba(255,255,255,.06)}\n.arc-card-preview{height:160px;position:relative;overflow:hidden;flex-shrink:0}\n.arc-card-preview canvas{width:100%;height:100%;display:block}\n.arc-card-body{padding:1rem 1.2rem 1.2rem;flex:1;display:flex;flex-direction:column}\n.arc-card-tag{font-family:'Space Mono',monospace;font-size:8px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:.4rem}\n.arc-card-title{font-size:14px;font-weight:500;color:\n.arc-card-desc{font-size:12px;color:\n.arc-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:.8rem;padding-top:.8rem;border-top:.5px solid rgba(255,255,255,.06)}\n.arc-card-world{font-family:'Space Mono',monospace;font-size:9px;color:\n.arc-play-btn{background:rgba(74,222,128,.15);border:.5px solid rgba(74,222,128,.35);border-radius:6px;padding:.3rem .8rem;font-family:'Space Mono',monospace;font-size:9px;letter-spacing:.08em;text-transform:uppercase;color:\n.arc-play-btn:hover{background:rgba(74,222,128,.3)}\n/* fullscreen game modal */\n.arc-modal{display:none;position:fixed;inset:0;z-index:500;background:rgba(4,6,15,.96);backdrop-filter:blur(12px)}\n.arc-modal-inner{max-width:780px;margin:0 auto;padding:5rem 1.5rem 3rem;height:100%;display:flex;flex-direction:column}\n.arc-modal-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:1rem;gap:1rem}\n.arc-modal-title{font-size:1.4rem;font-weight:300;color:\n.arc-modal-sub{font-size:11px;color:\n.arc-modal-close{background:rgba(255,255,255,.06);border:.5px solid rgba(255,255,255,.1);border-radius:8px;padding:.4rem .9rem;font-family:'Space Mono',monospace;font-size:10px;color:\n.arc-modal-close:hover{color:\n.arc-modal-score{font-family:'Space Mono',monospace;font-size:12px;color:\n.arc-modal-cv{width:100%;border-radius:10px;display:block;cursor:pointer;flex:1;max-height:380px}\n.arc-modal-start{background:rgba(74,222,128,.12);border:.5px solid rgba(74,222,128,.3);border-radius:8px;padding:.5rem 1.2rem;font-family:'Space Grotesk',sans-serif;font-size:13px;color:\n.arc-modal-start:hover{background:rgba(74,222,128,.25)}\n\n

🕹 Space Arcade\n

All

Planets

Moons

KBOs

Interstellar

\n \n

Space Arcade

Every minigame in the Solar System Explorer — play them all here

\n\n\n\n

\n\n\n

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\n Space Blog\n \n

The Space Blog

Dispatches from across the solar system — science, exploration, and cosmic perspective.

\n\n

\n \n

Scroll to explore

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Tris

Make The Elements!

Our Solar System

Solar System Scope+

Social