All That Space
all that space · that's a lot of space

You live inside the strangest thing that exists.

Stars, black holes, time, atoms, galaxies, life — and every weird in-between. Reality is bigger than you think. Come look.

Fall into a black hole →
Start here
"A place in the sky where the door only opens one way."
Black Hole · LMR-007
Plaything
"You're reading messages that left stars before humans existed."
Light · LMR-002
Unsolved
"Most of the universe is invisible. We only see its footprints."
Dark Matter · LMR-031
§ The Atlas

Pick a corner of the cosmos. Get pleasantly lost.

Tap whatever pulls at you. One strange thing always leads to another out here.

Matter
Matter · LMR-001
You are mostly empty space — held together by rules.
Atom→
Matter · LMR-041
Three of these make a proton. Alone? Nobody's ever seen one.
Quark→
Matter · LMR-042
What happens when atoms hold hands.
Molecule→
Matter · LMR-043
For every you, there could be a not-you.
Antimatter→
Matter · LMR-044
Right now, trillions are passing through your thumbnail.
Neutrino→
Light
Light · LMR-002
You're reading messages that left stars before humans existed.
Light→
Light · LMR-014
The universe is stretching, and dragging every wavelength of light with it.
Redshift→
Light · LMR-045
A massless messenger that always travels at the universe's speed limit.
Photon→
Light · LMR-046
The rainbow keeps going in both directions, forever.
Spectrum→
Light · LMR-047
Your skin can see infrared. Your eyes just can't.
Infrared→
Light · LMR-048
A color too high for your eyes — and it's quietly rewriting your skin.
Ultraviolet→
Light · LMR-049
A telescope tuned to see the first galaxies that ever lit up.
JWST→
Light · LMR-051
Light vibrates in a direction. Some animals can see this.
Polarization→
Gravity & Time
Gravity & Time · LMR-019
Move fast, age slow. Sit in deep gravity, age slow. Time is weather.
Time Dilation→
Gravity & Time · LMR-003
It's not a pull. It's a slope.
Gravity→
Gravity & Time · LMR-085
Move fast enough and the world flattens in your direction of travel.
Length Contraction→
Gravity & Time · LMR-086
A spinning mass literally drags spacetime around with it.
Frame Dragging→
Gravity & Time · LMR-087
Ripples in spacetime, detected for the first time in 2015.
Gravitational Waves→
Gravity & Time · LMR-088
Mass bends light. Galaxies turn into natural telescopes.
Lensing→
Gravity & Time · LMR-089
Space and time aren't a stage. They're an actor.
Spacetime→
Stars
Stars · LMR-010
The Sun is detonating 600 million tons of hydrogen every second.
Star→
Stars · LMR-006
How to make sunlight: squeeze hydrogen until it gives up.
Fusion→
Stars · LMR-012
A teaspoon of one weighs as much as Mount Everest.
Neutron Star→
Stars · LMR-052
One dying star outshining its entire galaxy of 100 billion siblings.
Supernova→
Stars · LMR-053
A dead star's leftover ember. Will cool for a trillion years.
White Dwarf→
Stars · LMR-054
The Sun's swollen future. It will swallow Mercury and Venus.
Red Giant→
Stars · LMR-055
A neutron star lighthouse, blinking hundreds of times a second.
Pulsar→
Stars · LMR-056
Not quite a star, not quite a planet. The universe's middle child.
Brown Dwarf→
Planets
Planets · LMR-024
There are more planets in the galaxy than stars in it.
Exoplanet→
Planets · LMR-057
The 'not too hot, not too cold' orbit. Earth is in it. Probably others are too.
Habitable Zone→
Planets · LMR-058
One face eternal day. The other face eternal night.
Tidal Locking→
Planets · LMR-059
Some are bigger than planets. Some have oceans under ice.
Moons→
Planets · LMR-060
100,000 km wide. About 20 meters thick. Mostly ice.
Saturn's Rings→
Planets · LMR-062
Dirty snowballs from the edge of the solar system, on million-year orbits.
Comets→
Black Holes
Black Holes · LMR-007
A place in the sky where the door only opens one way.
Black Hole→
Black Holes · LMR-063
Black holes leak. Slowly. Eventually, even they disappear.
Hawking Radiation→
Black Holes · LMR-064
Where the math says infinity. Where the physics throws its hands up.
Singularity→
Black Holes · LMR-092
The brightest things in the universe are made of stuff falling.
Accretion Disk→
Galaxies
Galaxies · LMR-020
A herd of a hundred billion stars, held together by gravity and dark matter.
Galaxy→
Galaxies · LMR-065
A baby black hole eating so fast it outshines its entire galaxy.
Quasar→
Galaxies · LMR-066
Our nearest big neighbor. Will collide with us in 4.5 billion years.
Andromeda→
Galaxies · LMR-067
Galaxies don't drift randomly. They live on filaments around vast empty voids.
Cosmic Web→
Galaxies · LMR-068
Our cosmic neighborhood. A few dozen galaxies, tightly bound.
Local Group→
Cosmology
Cosmology · LMR-040
Not an explosion in space. An expansion of space.
Big Bang→
Cosmology · LMR-061
The reason your room gets messier on its own.
Entropy→
Cosmology · LMR-069
The afterglow of the Big Bang, still arriving 13.8 billion years later.
CMB→
Cosmology · LMR-070
In 10⁻³² seconds, the universe grew by a factor of 10²⁶.
Inflation→
Cosmology · LMR-071
The universe's quiet, lukewarm forever.
Heat Death→
Cosmology · LMR-072
Maybe ours is one bubble in a foam of universes.
Multiverse→
Dark Universe
Dark Universe · LMR-031
Most of the universe is invisible. We only see its footprints.
Dark Matter→
Dark Universe · LMR-032
Something is pushing space apart faster, and we have no idea what.
Dark Energy→
Dark Universe · LMR-073
What if gravity itself is just wrong on huge scales?
MOND→
Dark Universe · LMR-074
A tiny particle that might solve dark matter and another mystery at once.
Axion→
Dark Universe · LMR-075
The favorite suspect for dark matter — that hasn't shown up to a single lineup.
WIMP→
Quantum
Quantum · LMR-050
Until you look, a tiny thing can be in many places at once.
Superposition→
Quantum · LMR-076
Two particles, one shared fate, no matter how far apart.
Entanglement→
Quantum · LMR-077
Position and speed can't both be known. The universe forbids it.
Uncertainty→
Quantum · LMR-078
Particles walk through walls. That's why the Sun shines.
Tunneling→
Quantum · LMR-079
A property called 'spin' that doesn't actually involve spinning. Welcome to quantum.
Spin→
Quantum · LMR-090
At the smallest scales, the universe stops being a thing and starts being a probability.
Quantum→
Life
Life · LMR-080
A recipe for guessing how many alien civilizations there might be.
Drake Equation→
Life · LMR-081
If the universe is teeming with life, where is everyone?
Fermi Paradox→
Life · LMR-082
Earth life that survives boiling acid, radiation, and vacuum. The bar is low.
Extremophiles→
Life · LMR-083
Maybe life didn't start here. Maybe it hitched a ride.
Panspermia→
Life · LMR-084
Chemical fingerprints of life. JWST is sniffing for them right now.
Biosignatures→
Life · LMR-091
Chemistry that woke up and started copying itself.
Life→