StarMap

Time

Layers

Sky display

Field of view ringCentered on screen

Settings

Location

Sky

Light pollution

Star size

Faint star depthExtra magnitudes beyond the naked-eye limit

Atmospheric refraction

ProjectionStereographic keeps wide views undistorted

Ground

Landscape

Twinkling starsScintillation near the horizon, realistic display only

Sun, Moon and planet sizeEnlarge discs beyond true scale

PowerBattery saver redraws only when something changes, at most 30 frames a second, at a slightly lower sky resolution

Update satellites automaticallyOnce a day from CelesTrak when online; everything else stays offline

Picture

Telescope

Telescope focal length (mm)Eyepiece focal length (mm)

Eyepiece apparent field (°)

Compass

North correctionUse Align in an object's card for an exact fix

About

Stars: HYG Database v4.0 (astronexus.com, CC BY-SA 4.0), 25,791 stars to magnitude 7.5 with distances for 3D flight. Constellations, boundaries, deep-sky objects (Messier plus 1,179 NGC, IC and other objects to magnitude 11) and Milky Way outline: d3-celestial by Olaf Frohn (BSD). Constellation artwork: Stellarium modern sky culture illustrations (Free Art License). Sun, Moon and planets: Astronomy Engine by Don Cross (MIT), truncated VSOP87 and ELP. Everything is bundled; StarMap works offline.