An interactive cosmos · est. 13.8 billion years ago

From a singularity to a sea of galaxies — 13.8 billion years, 2 trillion galaxies, and 1011 stars in each. Scroll to drift deeper into the void.

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01 · Scale of the cosmos

Nothing is close.
Everything is far.

Distance in space stops meaning what we know it to. These are the rungs of the cosmic ladder — each one a jump of scale that reshapes intuition.

The Earth → Moon

One light-second stretched across the void. A laser round trip takes 2.5 seconds.

384,400 kmto the Moon

The Solar System

Light takes 4.3 hours to reach Pluto — and we leave it all behind, the Voyager 1 probe still counting.

5.9B kmto Pluto

The Nearest Star

Proxima Centauri, our closest stellar neighbour, sits 4.24 light-years away. Light itself needs years.

4.24 lyto Proxima

Our Galaxy

The Milky Way is 100,000 light-years across. A photon would spend a hundred millennia crossing it.

100k lygalaxy span

The Observable Universe

93 billion light-years of everything we can ever see — a sphere our tiny galaxy floats inside of.

93B lyobservable
02 · Orbital mechanics

A system in perpetual fall.

A planet in orbit is falling forever and missing. Hover the system to freeze time; use the controls to bend its speed.

03 · History of everything

13.8 billion years,
compressed.

If the universe were a single year, every human civilization would fit inside the final hour. Here is the story so far.

t = 0

The Big Bang

Space, time, energy, and everything that follows begin. In a fraction of a second the universe inflates faster than light.

3 min

First Atoms

The universe cools enough for protons and neutrons to fuse into hydrogen and helium — the raw fuel of all future stars.

200M yrs

First Stars Ignite

Gravity pulls gas into the first giant stars. Inside their cores, the first heavy elements — carbon, oxygen, iron — are forged.

1B yrs

Galaxies Take Shape

Stars cluster into the first galaxies. Structure emerges from the soup — the scaffolding of the cosmos as we know it.

9.2B yrs

Sun & Earth Form

A cloud of gas and dust collapses. At its heart a star ignites; in its orbit, a rocky world cools — and something begins to stir.

13.8B yrs

Now

You, reading this, are the universe observing itself. Every atom in your body was made in the heart of a star.

04 · Celestial wonders

Objects that defy your mind.

Move your cursor across a card to feel its depth. Each one is a place physics turns strange.

Black Holes

Regions where gravity wins. Inside the event horizon, not even light escapes — and time itself drags toward the singularity.

∞central density

Nebulae

Cosmic nurseries of gas and dust where new stars are born. The Pillars of Creation stand 6,500 light-years away, still forming.

6,500 lyto the Pillars

Supernovae

A star's violent death outshines an entire galaxy. In that blast, the iron in your blood was forged and scattered across space.

10⁴⁴ Wpeak power

Exoplanets

Over 5,700 confirmed worlds orbit other stars — many alien, some in the temperate zone where liquid water might pool.

5,700+confirmed

Neutron Stars

A city-sized core of a dead star, denser than an atom. A single sugar-cube of its matter weighs about Mount Everest.

10¹⁷ kg/m³density

Galaxies

Islands of a trillion stars held together by gravity and mystery. Dark matter binds it all — and we still don't know what it is.

2T+in the universe
0
Age of the universe
0
Estimated galaxies
0
Observable diameter
0
Confirmed exoplanets
05 · Gravity playground

Bend spacetime.

Move your pointer to become a source of gravity. Particles orbit, swirl, and collapse toward you — a toy model of mass warping the fabric of space. Click to reset the swarm.

Move your pointer to pull the swarm
Interactive · N-body attractor