Skip to content
CELESTIUM
Atlas Discoveries Timeline Tonight About Join Us
Atlas Discoveries Timeline Tonight About Join Us
ambient transmissionThe Geometry of Breath 0:00
Updates
Reading Room - 26 Jul 2026The QuestionScience, religion and the answer humanity was ordered not to examine. The Heretics - 12 Jul 2026Five lives restored to the shelfEach documented life now carries a sourced historical portrait. Navigation - 12 Jul 2026Aperture refinedKeyboard focus and page transitions now behave as one system.

We are star stuff, exploring the universe, understanding ourselves.

Carl Sagan
108kmapped stars 1 flightshore to deep space Atlas / live model Earth is moving at 107,000 km/h. 1:1relative scale228worlds mapped Enter the universe → The AtlasFly the known universe, to scale Signal 05Water vapour tracesK2-18b Evidence / spectroscopy A planet 120 light-years away left fingerprints in its starlight. Follow the evidence → DiscoveriesThe story of how we know Tonightyour sky right now - -local time View full sky Live multiplayer / science Knowledge is propulsion. Escape the horizon → Event HorizonOutrun a growing black hole Now13.8 billion yearsexpand the story You are here / 13.8 BY The universe can now look back at itself. Move through time → TimelineFirst light to far future HCOFe Inside you Carbon. Oxygen. Iron. Trace every atom → StardustThe atoms that are you IIIIIIIVV New shelfThe Hereticsfive lives they tried to silence New on the shelf The Heretics Five lives restored → The Reading RoomThe Witnesses · The Heretics MissionScience with awewithout the noise Why Celestium Evidence and wonder belong together. Read our reason → AboutWhy Celestium exists Open invitation Bring your questions to the cosmos. Walk with us → Join usWalk with the cosmos

The Universe, examined

CELESTIUM

Stand beneath the whole of what we know - from the first light to the instruments listening right now.

Find your place Enter the timeline
Descend

Perspective

You are
somewhere here.

Positions live
Level 01 - Home
Earth
12,742 km

A single pale stone. Every war, ocean and idea you know of has happened on this one dot.

↓ Scroll to zoom out - drag to look around

You are here

You are somewhere here.

From a single person to the observable universe - Earth, the Solar System, the nearest stars, the Milky Way, the Local Group, and the cosmic web of galaxies. Thirteen orders of magnitude, and you are one quiet point inside all of it.

Featured discovery

Start with
this one.

Two black holes spiralling together, warping the spacetime around them.
Spacetime - 2015

The night we heard two black holes collide.

A billion years ago two black holes spiralled together and shook spacetime itself. In September 2015 that tremor reached Earth and moved a mirror by less than the width of a proton.

Read the discovery  →

The Discovery Series

Where to
begin.

Landmark pieces, each written at three depths - from a twenty-second glance to the full dive.

Explore all 15 discoveries  →

Immersive journeys

Don't read it.
Stand in it.

Two full-screen journeys: the life of the universe, and the matter that became you.

The flagship

The Timeline

From the first instant to the last light - one continuous journey through the life of the universe.

Begin the journey  →
Personalised

You Are Stardust

The 13.8-billion-year story of your own atoms, told with your name on it.

Trace your atoms  →

The sky is
not a museum.

It is happening now - and pouring through you as you read.

Coordinated cosmic time
--:--:--
-
Light of the Big Bang
-
ancient photons from the universe's first light have passed through your body since you opened this page
Astronomy picture of the day - NASA
Loading from NASA…
The image the agency is showing the world today.
Your speed through the cosmos
370 km/s
- km carried through space, relative to the Big Bang's afterglow, since you arrived
The Space Station, right now
Locating…
Live position of the ISS, refreshed every few seconds.
Ghosts from the Sun's core
-
solar neutrinos have streamed through your fingertip, touching nothing, since you opened this page
A pinnacle of
science.

Built to make the universe feel close enough to touch.

Explore

PerspectiveCosmic Timeline Tonight's SkyDiscoveries

The Series

All discoveriesAbout RSS feed

Connect

Join us Instagram Newsletter
© 2026 CELESTIUM - Δ All distances approximate; wonder is not. LAT -.-- - LON -.-- - LOOKING UP