Two maps of the same world. One is the things on the ground — the pads rockets leave from, the mountains the telescopes sit on, the holes in the ground something left behind. The other is how dark the sky is above them.
Search for a town or paste a coordinate, or press ◎ for where you are. Coastlines, borders, states and roads sharpen as you go in.
Search an address or press ◎ to put yourself in the middle. The crosshair reads the zone under it, and the detail sharpens four-fold as you go in.
The nine zones · Bortle-equivalent, estimated from satellite data
1PristineBortle 1–2 · naked eye to mag 7.2–8.0The Milky Way casts a shadow. Airglow is visible, the zodiacal light reaches across the sky, and the darkest places on Earth look like this.
2RuralBortle 2–3 · naked eye to mag 6.7–7.5The Milky Way is structured and obvious. Light domes sit low on the horizon over distant towns, and the rest of the sky is genuinely dark.
3Rural transitionBortle 3–4 · naked eye to mag 6.2–7.0The Milky Way is clearly there but loses its detail near the horizon. Light domes are obvious in several directions.
4Suburban edgeBortle 4–5 · naked eye to mag 5.7–6.5The Milky Way is a faint band overhead and gone lower down. The sky is noticeably grey rather than black.
5SuburbanBortle 5–6 · naked eye to mag 5.2–6.0The Milky Way is invisible or nearly so. Clouds are lit from below. You can read a newspaper outside on a clear night.
6Bright suburbanBortle 6–7 · naked eye to mag 4.7–5.5The sky within thirty degrees of the horizon glows greyish white. Only the brighter constellations survive.
7UrbanBortle 7–8 · naked eye to mag 4.2–5.0The whole sky is greyish. Stars beyond the fourth magnitude are gone, and the Pleiades are a smudge if they show at all.
8Inner cityBortle 8–9 · naked eye to mag 4.0–4.5A few dozen stars, the Moon and the planets. The sky has a colour, and it is not black.
9CoreBortle 9 · naked eye to mag under 4.0The brightest handful of stars, and nothing else. Orion is recognisable only by its belt.
Zone 1 is not painted: it is nine tenths of the planet, and leaving it clear is what makes the rest readable.
Search for a town or paste a coordinate — 51.5, -0.13 and 51°30'26"N 0°7'39"W both work. Drag to pan, and click any marker for the detail. Click into the map to give it the scroll wheel — Esc hands it back — or use the zoom buttons; on a touch screen, pinch. Markers within about ten kilometres of each other are drawn as one, and the panel lists everything at that spot. Without JavaScript the map is still a map: every marker links into the list below, which is the same content.
Launches
Scheduled and recently flown, on the pad it flies from.
Launch · · scheduled
Progress MS-36 (97P)
31/6 · Baikonur Cosmodrome, Republic of Kazakhstan
46.00°N 63.56°E
Soyuz 2.1b is scheduled to fly from 31/6, operated by Russian Federal Space Agency (ROSCOSMOS).
Satish Dhawan Space Centre First Launch Pad · Satish Dhawan Space Centre, India
13.73°N 80.23°E
SSLV is scheduled to fly from Satish Dhawan Space Centre First Launch Pad, operated by Indian Space Research Organization. The operator has not committed to an hour yet, so this window is approximate.
Space Launch Complex 41 · Cape Canaveral SFS, FL, USA
28.58°N 80.58°W
Vulcan VC6L is scheduled to fly from Space Launch Complex 41, operated by United Launch Alliance. The operator has not committed to an hour yet, so this window is approximate.
Long March 12 series Pad · Jiuquan Satellite Launch Center, People's Republic of China
40.89°N 100.22°E
Long March 12A is scheduled to fly from Long March 12 series Pad, operated by China Aerospace Science and Technology Corporation. The operator has not committed to an hour yet, so this window is approximate.
Vehicle
Long March 12A
Operator
China Aerospace Science and Technology Corporation
Space Launch Complex 40 · Cape Canaveral SFS, FL, USA
28.56°N 80.58°W
Falcon 9 Block 5 is scheduled to fly from Space Launch Complex 40, operated by SpaceX. The operator has not committed to an hour yet, so this window is approximate.
Space Launch Complex 40 · Cape Canaveral SFS, FL, USA
28.56°N 80.58°W
Falcon 9 Block 5 is scheduled to fly from Space Launch Complex 40, operated by SpaceX. The operator has not committed to an hour yet, so this window is approximate.
Ariane Launch Area 4 · Guiana Space Centre, French Guiana
5.26°N 52.79°W
Ariane 64 Block 2 is scheduled to fly from Ariane Launch Area 4, operated by Arianespace. The operator has not committed to an hour yet, so this window is approximate.
Satish Dhawan Space Centre Second Launch Pad · Satish Dhawan Space Centre, India
13.72°N 80.23°E
GSLV Mk. II is scheduled to fly from Satish Dhawan Space Centre Second Launch Pad, operated by Indian Space Research Organization. The operator has not committed to an hour yet, so this window is approximate.
Where Starship is built and flown, on the Gulf coast a few miles from the Mexican border. The tower catches the booster on its return rather than landing it on legs.
Two degrees from the equator on the Atlantic coast — geographically one of the best launch sites there is, and still waiting for a vehicle to use it properly.
Often called the most beautiful launch site in the world, on a subtropical island where launches were once restricted to two short windows a year by a fishing agreement.
Five degrees off the equator, which is as much free rotational velocity as any operating spaceport gets, and open ocean to the east. Ariane 6 and Vega fly from here.
The west-coast range, and the one American site with a clear path south — which is why almost every US polar and sun-synchronous payload leaves from here.
NASA's sounding-rocket range and the departure point for Antares cargo runs to the station. Small enough that a launch is visible from most of the Delmarva peninsula.
Shenzhou capsules now return to this desert site next to Jiuquan rather than the grassland further east — the ground is flatter and the weather is more predictable. Position approximate.
Crews returning from the station come down under parachute onto flat steppe, with retro-rockets firing a metre above the ground. Recovery helicopters are usually there within minutes.
A 39 m segmented mirror under construction on a levelled peak next door to Paranal. When it opens it will be the largest optical telescope ever built, by a wide margin.
A 8.4 m survey telescope with a 3.2-gigapixel camera, built to photograph the whole southern sky every few nights for ten years and catalogue everything that moves or changes.
Europe's 3 km interferometer. Adding it to the two LIGO sites cut the sky localisation of a neutron-star merger from hundreds of square degrees to tens.
The largest filled-aperture radio telescope in the world, its 500 m reflector actively reshaped by 2,225 winches under the surface. It has found over a thousand pulsars.
One of the two 4 km interferometers that recorded the first gravitational wave from a black hole merger. Two sites, because a real signal has to appear in both.
Sixty-six millimetre-wave dishes at 5,000 m, moved around the plateau on custom transporters to change the array's resolution. It resolves the dust gaps in planet-forming discs.
A 10 m millimetre-wave dish mapping the cosmic microwave background, above a cubic kilometre of instrumented ice that detects neutrinos by the light they leave passing through it.
Five Cherenkov telescopes that photograph the blue flash a gamma ray makes when it hits the atmosphere — the atmosphere is the detector, they just watch it.
Four 8.2 m unit telescopes that can be combined into one interferometer, on a mountain flattened for the purpose. Among the driest and darkest skies used for astronomy.
A ridge above the clouds carrying the 10.4 m Gran Telescopio Canarias, the largest single-aperture optical telescope in operation, and the northern Cherenkov array.
A six-metre mirror that held the size record for thirteen years, and the first big telescope built on an altazimuth mount — the arrangement every large telescope has used since.
Thirteen instruments at 4,200 m, including Keck I and II, Subaru and the JCMT. The summit is sacred ground to Native Hawaiians, and the question of what may be built there is unresolved.
Where the Dark Energy Survey ran its camera for six years, mapping 300 million galaxies to measure how fast the expansion of the universe is accelerating.
Pan-STARRS surveys for moving objects from this summit — it found ‘Oumuamua — alongside the 4 m Inouye Solar Telescope, the highest-resolution view of the Sun there is.
More than twenty telescopes on Tohono O'odham land, including the Mayall 4 m, which now runs DESI — five thousand robotic fibres measuring redshifts all night.
Tracked Sputnik's carrier rocket weeks after it was finished, and is now a World Heritage Site and the headquarters of the Square Kilometre Array Observatory.
The 200-inch Hale Telescope was the largest in the world for 45 years. The Zwicky Transient Facility now sweeps the same sky nightly for anything that flares.
The southern-hemisphere station, and the only one that can still talk to Voyager 2 — the spacecraft left the ecliptic heading south and has never come back into northern view.
A 20 m rock exploded at 30 km altitude with the energy of 500 kilotons. The shockwave broke windows across six cities and injured 1,500 people, almost all by flying glass.
A 180 km crater, half of it under the Gulf, left by a 10 km asteroid 66 million years ago. The impact ended the Cretaceous and about three quarters of all species with it.
An impact 1.85 billion years ago melted through the crust and concentrated nickel and copper into what became one of the richest mining districts in the world.
A 24 km crater with a town built inside it. Apollo astronauts trained here, and the church in Nördlingen is built of impact breccia full of tiny diamonds.
A kilometre wide, fifty thousand years old, and the first structure on Earth to be proved an impact rather than a volcano — the argument took until the 1960s.
Known to the Djaru people as Kandimalal long before it was surveyed from the air in 1947. Nearly 900 m across and remarkably well preserved by the desert.
Sixty tonnes of iron lying flat in a field — the largest single meteorite ever found, and the largest naturally occurring piece of iron on the surface of the Earth. It has never been moved.
A strewn field of iron meteorites four thousand years old, known to the local people and recorded by Spanish expeditions from 1576. Individual masses run to thirty tonnes.
An iron meteorite broke up over the Russian far east in 1947 and left more than a hundred craters and thirty tonnes of recovered fragments — the largest observed iron fall in history.
An airburst of perhaps 12 megatons flattened 2,000 km² of forest in 1908 and left no crater. The first expedition did not reach the site for nineteen years.
Bright bolides caught by sensors in the last few years.
Fireball ·
Fireball of 2026-09-15
37.60°S 161.60°W
A bolide detected by US government sensors, which released about 79 tonnes of TNT, at an altitude of 37 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 200 tonnes of TNT, at an altitude of 70 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 670 tonnes of TNT, at an altitude of 38 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 330 tonnes of TNT, at an altitude of 34 km, travelling 19 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 130 tonnes of TNT, at an altitude of 37 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 130 tonnes of TNT, at an altitude of 30 km, travelling 12 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 100 tonnes of TNT, at an altitude of 45 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 110 tonnes of TNT, at an altitude of 32 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 110 tonnes of TNT, at an altitude of 33 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 1.1 kilotons of TNT, at an altitude of 32 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 120 tonnes of TNT, at an altitude of 32 km, travelling 16 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 190 tonnes of TNT, at an altitude of 33 km, travelling 23 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 200 tonnes of TNT, at an altitude of 36 km, travelling 25 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 160 tonnes of TNT, at an altitude of 29 km, travelling 18 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 100 tonnes of TNT, at an altitude of 62 km, travelling 18 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 79 tonnes of TNT, at an altitude of 37 km, travelling 37 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 86 tonnes of TNT, at an altitude of 91 km, travelling 69 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 170 tonnes of TNT, at an altitude of 35 km, travelling 12 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 98 tonnes of TNT, at an altitude of 27 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 370 tonnes of TNT, at an altitude of 45 km, travelling 15 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 76 tonnes of TNT, at an altitude of 44 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 190 tonnes of TNT, at an altitude of 32 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 120 tonnes of TNT, at an altitude of 89 km, travelling 71 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 290 tonnes of TNT, at an altitude of 25 km, travelling 19 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 320 tonnes of TNT, at an altitude of 30 km, travelling 16 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 280 tonnes of TNT, at an altitude of 42 km, travelling 19 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 73 tonnes of TNT, at an altitude of 41 km, travelling 27 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 480 tonnes of TNT, at an altitude of 25 km, travelling 18 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 98 tonnes of TNT, at an altitude of 37 km. Most fireballs this size break up long before the ground and are never seen by anyone.
A bolide detected by US government sensors, which released about 440 tonnes of TNT, at an altitude of 24 km, travelling 21 km/s. Most fireballs this size break up long before the ground and are never seen by anyone.
Certified reserves and parks where the night is still dark enough to see the galaxy.
Dark sky ·
Warrumbungle National Park
New South Wales, Australia
31.28°S 149.00°E
Australia's first dark-sky park, alongside Siding Spring Observatory, protected by lighting regulations that the observatory needed and the park inherited.
The valley below the Chilean observatories, and the world's first International Dark Sky Sanctuary — the same sky Cerro Tololo and Rubin were built for, from the ground.
A reserve built around a working observatory on a 2,877 m summit, reachable by cable car — one of the few places where the public can sleep beside a research telescope.
The first reserve in Wales, an hour from three million people, which is the point: it demonstrates that dark skies survive next to cities when lighting is controlled rather than removed.
One of the first gold-tier reserves anywhere, covering 4,300 km² of the Southern Alps. The Magellanic Clouds are naked-eye objects here, which is the practical definition of a dark sky.
Africa's first certified reserve, and among the darkest measured places on Earth — the sky glow is close to the natural airglow floor, which is as dark as a sky physically gets.
Europe's first designated dark-sky reserve. On a good night the Milky Way casts a faint shadow here, which almost nobody in southern England has ever seen.
A field on a Pennsylvania plateau that draws hundreds of telescopes on a clear new-moon weekend, and one of the few genuinely dark sites within reach of the American northeast.
The world's first International Dark Sky Reserve, created after the surrounding municipalities replaced 2,500 light fittings to protect the observatory on the summit.
Zones are Bortle-equivalent and estimated from satellite night-lights. What ruins your sky is rarely the lamp in your street — it is the city forty kilometres away — so the model spreads each source the way light actually scatters.
Good enough to tell a Bortle 3 from a Bortle 7. Not a measurement: that needs a sky quality meter pointed at your own zenith, and cloud, humidity, snow and the Moon all move it.
The dark-sky reserves and parks on the map are the places that have done something about it — certification takes a lighting plan, not just a dark postcode. Data credits are on the credits page.
Eruptions are listed only while they are still active. Fireballs are the ones government sensors detected and located. The fixed sites were placed by hand.
Towns can be searched by name — accents do not matter, spelling does. Each place carries one name and the language varies, so where a name fails, a coordinate always works.
The map lets you go closer than the underlying survey deserves: down at a few kilometres across a coastline is indicative and a border is roughly where a border is. Not good enough to navigate by. Credits are on the credits page.