Type PlanetMoonStarBlack HoleNebulaGalaxy Name Size  2.0 Mass  10 Orbit Target Orbit Radius  50 + Spawn Object

Click an object in space first, then adjust here.

Size  1.0 Mass  1.0 New Orbit Target Apply Changes

Select two objects to collide. Debris will fragment and accrete into a new planet!

Object A Object B Collision Speed  40 Start Collision! Fragment Count  40 Gravity Strength  1.0 Form new planet from debris Show debris fragments Show dust cloud

Sun Brightness  1.8 Ambient Fill  0.08 Light Orbit Angle  0°

Rotate the sunlight source around the Y axis to simulate day/night on different sides of planets.

Exposure  1.1 Shadows

Name Radius  2.0 Mass  6.0 Gravity  9.81 m/s² Rotation Speed  0.008 Color Orbit Target Orbit Radius  55 Orbit Speed  0.025 ✓ Apply Changes

Show Labels Show Orbit Lines Orbit Line Color Star Glow Atmospheric Glow Asteroid & Kuiper Belts

Select any object in space, then choose a real-world ring preset or customize manually.

Ring Preset ✎ Custom (manual) Saturn — icy banded rings Jupiter — faint dark ring Uranus — tilted dark rings Neptune — narrow dark rings Rhea — tenuous ring (Saturn moon) Haumea — narrow ring Chariklo — double ring (centaur) Fomalhaut — bright debris disc Beta Pictoris — edge-on disc HR 4796A — narrow bright ring Sagittarius A* — accretion disc style M87* — hot plasma ring Inner Radius  1.40× Outer Radius  2.60× Ring Tilt  0.15 Opacity  0.70 Ring Color

Search for any object — planet, moon, star, galaxy, black hole, nebula…

Pick two bodies — see how many of the smaller one fit inside the larger by volume (real diameters).

Object A Object B Compare