Star Map: Night Sky Guide

Star Map tells you what you're looking at. Raise your phone toward the sky and it renders the actual star field for your location and the current moment.

REAL CELESTIAL MECHANICS, NOT DECORATION
Positions are computed from Julian date, local sidereal time and altitude-azimuth conversion — the same math professional astronomy software uses. Stars appear where they genuinely are, not approximately where a pretty background image put them.

80 BRIGHT STARS, 10 CONSTELLATIONS
Sirius, Vega, Betelgeuse, Polaris and the rest of the naked-eye sky, plus the constellations worth learning first — the Big Dipper, Orion, Cassiopeia — drawn with their connecting lines.

TAP ANY STAR
Get its name, apparent magnitude, distance and a short note on why it matters. It's the fastest way to answer a child's question about the sky without inventing an answer.

NIGHT VISION MODE
A red-shifted interface that won't wreck your dark adaptation. Keep it open through an entire observing session.

TIME TRAVEL
Scrub time forward or back to see how the sky will look at midnight, or where a constellation sat last week. Plan an observing session before you drive out.

FULLY OFFLINE
The star catalogs ship inside the app. It works at full capability in a remote campsite with no signal — which is precisely where the sky is worth looking at.