Planthenight.Readthesky.

Tonight’s conditions, where the sun, moon and Milky Way will be from the spot you’ll stand, and a telescope that points itself. One app for the whole night out.

Get the app See what it does

✦Tonight’s conditions✦Sun & moon planner✦Terrain skyline✦Live sky view✦Milky Way planner✦Messier & NGC✦Telescope GoTo✦Astrophotography calculators✦Tonight’s conditions✦Sun & moon planner✦Terrain skyline✦Live sky view✦Milky Way planner✦Messier & NGC✦Telescope GoTo✦Astrophotography calculators

One app for the whole night

Anightoutusuallytakesfiveapps:aforecast,asuncalculator,askychart,acatalogueandtheremoteforyourmount.Astrkputstheminoneplaceandworksfromtheexactspotyou’llstand.

Stars in the sky view

109

Messier objects

App languages

Features

Everything between sunset and sunrise

Each tab in Astrk does one job well, and they all share the same sky, location and clock.

Tonight

Clouds, darkness and observing conditions where you are, with rise, set and twilight times for the sun and moon.

Plan

Pin where you’ll stand and what you want in frame. Astrk shows the terrain between them and where the sun and moon will be, minute by minute.

Night sky

A live star chart that follows your phone, with the sun, moon and Milky Way paths drawn over the camera view.

Deep sky

Search galaxies, nebulae and clusters by name, number or constellation, each with a real survey photo and where to find it.

Scope

Connect to your OnStep mount over Wi-Fi, see it in 3D, go to a target, track it and return home.

Tools

Camera settings and astrophotography calculators, plus a step-by-step guide to setting up and aligning your tracker.

✦Open-Meteo✦7Timer!✦CelesTrak✦NOAA SWPC✦Copernicus DEM GLO-90✦OpenStreetMap✦Digitized Sky Survey 2 · STScI✦CDS Strasbourg✦Deep-Sky Hunter Atlas✦US Naval Observatory✦OnStep✦Open-Meteo✦7Timer!✦CelesTrak✦NOAA SWPC✦Copernicus DEM GLO-90✦OpenStreetMap✦Digitized Sky Survey 2 · STScI✦CDS Strasbourg✦Deep-Sky Hunter Atlas✦US Naval Observatory✦OnStep

The app

Your night, in one app

Astrk runs on iPhone and Android, speaks seven languages and works from the spot you’ll stand.

Astrk

Astronomy · iOS & Android

Plan the night. Point with confidence.

Explore deep-sky objects, read the sky and control your telescope from one focused app. Astrk brings conditions, planning, discovery and mount control together for nights under the stars.