Interactive Star Map for Tonight’s Sky

What an interactive star map shows

A star map converts date, time, latitude, and longitude into the part of the sky above your horizon. That is why the same constellation can be high for one observer and below the horizon for another.

Why location matters

Your latitude changes which constellations can rise above the horizon. Your longitude and time determine where objects appear right now.

How AR helps

A flat star map is useful for planning, while AR helps compare the map with what your camera sees. Start with bright stars, then trace constellation lines.

How to read tonight’s star map

A useful star map is not just a picture of stars. It is a time-and-location view of what is above your horizon right now.

Altitude tells you how high to look above the horizon. Azimuth tells you the compass direction. Together, those values let the browser AR view place stars, planets, and constellations in a way that can be compared with your camera view.

Start with large patterns and bright objects. Once the big direction is right, smaller star labels and constellation lines become more useful.

Why a browser map can still be accurate

The astronomy calculation does not require a native app. Browser JavaScript can calculate sky positions from time, latitude, longitude, and object coordinates.

The harder part is aligning a phone’s camera and sensors with the real sky. That is why NightSky AR combines calculated positions with manual alignment controls.