Event horizon
Beyond this boundary, even light cannot return to the outside. It is not a solid surface you can stand on.
Set a course for the stars.
Turn, approach and explore 62 destinations in three-dimensional space.Tablet: choose “Start controls”, drag with one finger to turn, and spread or pinch two fingers to move forward or backward. Choose “Forward” to fly while steering, and “Stop here” to pause. Tap an object or choose a destination for autopilot. Computer: focus the view, then use W/S forward/back, A/D sideways, R/F up/down, arrows to turn, Space to stop, and the wheel to move closer or farther away.
This is a freely navigable educational scene. Stars, positions, sizes and speeds are arranged, not real coordinates or an infinite universe simulation. Planets use licensed textured globes; Saturn's rings are geometric diagrams. Galaxies, nebulae and black holes use original observation images. Unknown exoplanet appearances use wireframe markers or labeled artist concepts.
Planet textures: Solar System Scope / INOVE · CC BY 4.0. Added 3D spherical mapping and lighting. Full image sources and licenses · 3D engine and software licenses。
YOUR WINDOW INTO SPACE / 20 DESTINATIONS
Reach out,discover the sky.
Choose an object for today's adventure.
EARTH / Planet
Observation-based texture · reconstructed globeEarth
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Choose “Explore by touch”, then use one finger to rotate the globe, or spread two fingers to zoom. On a computer, drag, use the wheel, or use arrow keys and + / −. Maximum 5×; zooming cannot create detail absent from the original image.
What did you discover today?
Explore oceans and continents on our shared home.
Source: NASA ↗Reconstructed from observation-based textures, including color enhancement and infill of unmapped areas. Spherical projection and lighting are added by this project; rotation speed is interactive only.
ONE CONTINUOUS JOURNEY
From Earth,to all we can see.
Earth texture: Solar System Scope / INOVE · CC BY 4.0 · Spherical projection and lighting applied; other scales are educational models.
With gestures enabled: spread two fingers to approach, pinch to move away, and drag one finger sideways to rotate. On a computer, use the wheel or + / − keys. You can also drag the scale slider below.
Earth / Exploration notes
Diameter about 12,700 km
Start at home. Earth's appearance uses a texture made from observational data with color adjustments and spherical lighting. It is not a street map or live satellite view.
NASA source ↗A FIELD GUIDE TO THE COSMOS
From one planet,
step into the universe.
Travel through galactic arms and discover our Solar System.
Let curiosity guide your journey.
Milky Way · Educational illustration01 / MILKY WAY
Enable touch rotation and zoom. You can explore while the animation is paused.
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Scales and speeds are simplified · planets use licensed textures · not a live sky map
EXPLORATION NOTES
We live inside a galaxy.
The Milky Way is a barred spiral galaxy containing stars, gas and dust. Our Sun lies in the Orion Spur, with its planets orbiting it. The Solar System is only a small part of the Milky Way.
- light-years across the disk
- 100,000+
- years per galactic orbit
- About 230 million
- Our Sun's neighborhood
- Orion Spur
8 small worlds / SOLAR SYSTEM FILES
Small icy worlds hold big questions.
Choose a dwarf planet or moon to learn where it lives and what it travels with.
Dwarf planet · Pluto
Pluto
A distant world of mountains, plains and glaciers. New Horizons flew past Pluto in 2015.
- Approximate diameter
- 2,377 km
- Main body orbited
- Sun
- Region
- Kuiper Belt
Pluto takes about 248 Earth years to orbit the Sun. Its orbit is tilted and noticeably elliptical.
Think about it: Reclassification did not make Pluto disappear or reduce its scientific value.
NASA object data and observations ↗Checked September 11, 2026. Diameters come from NASA pages, sometimes calculated as twice the radius. Measurement and rounding precision vary. This is a data diagram; source pages provide observations.
10 worlds / EXOPLANET FILES
How long is a year on another world?
Choose a planet to compare size, orbital period and discovery method.
Super-Earth · Proxima Centauri b
Proxima Centauri b
A nearby world orbiting a red dwarf, with a year of about 11.2 Earth days.
- One year is about
- 11.2 Earth days
- Radius is about
- 1.02 ×Earth(estimated)
- Discovery year
- 2016
- Discovery method
- Radial velocity method
Think about it: Its size in this data set is estimated; an inferred radius is not a photograph of its surface.
NASA planet data and original values ↗Compare all 10 orbital periods
| Planet | Orbital period | Discovery method | Source |
|---|---|---|---|
| 55 Cancri e | 0.7 days | Radial velocity method | NASA ↗ |
| WASP-12 b | 1.1 days | Transit method | NASA ↗ |
| GJ 1214 b | 1.6 days | Transit method | NASA ↗ |
| HD 189733 b | 2.2 days | Radial velocity method | NASA ↗ |
| HD 209458 b | 3.5 days | Radial velocity method | NASA ↗ |
| WASP-39 b | 4.1 days | Transit method | NASA ↗ |
| Proxima Centauri b | 11.2 days | Radial velocity method | NASA ↗ |
| TOI-700 d | 37.4 days | Transit method | NASA ↗ |
| Kepler-186 f | 129.9 days | Transit method | NASA ↗ |
| Kepler-452 b | 384.8 days | Transit method | NASA ↗ |
Compiled September 10, 2026; additions checked September 11, 2026. Values are rounded from NASA's catalog and may change with research. Estimates are labeled. These are data diagrams; no new third-party images are included.
Discoveries along the way · 19 learning topics
Keep traveling. Keep asking questions.
How do we find an invisible black hole?
Accretion disk
Gas falling toward a black hole may form a hot, glowing disk. A black hole without nearby matter may have no bright accretion disk.
Shadows and gravitational lensing
Strong gravity bends light, producing distorted images and a dark central region. The shadow and event horizon are not the same size.
What is inside?
General relativity predicts a singularity, but this may mark a limit of the theory. Black-hole interiors and wormholes have not been photographed.