A star for a night you remember

Choose a place and a moment that matters to you. Revisit its sky, spin the wheel and meet one of the stars that was above the horizon.

Think of a place you’d like to return to, an evening you spent with someone, or an ordinary night you still remember. You can leave yourself a line about it on the card you’ll take away.

Choose your moment

Leave the time blank to use 9 p.m. local time. The map shows the exact time it uses.

How the wheel chooses

The map uses more than 5,000 catalogue stars across the whole sky. The wheel gives an equal chance to each of the 67 named stars in the guide that is at least 10° above your horizon. If your chosen time is in daylight or bright twilight, the map advances to the next time the Sun is at least 6° below the horizon and shows that time instead.

Positions are approximate. The viewing guide uses a clear, unobstructed horizon. Your entries and the card are processed in your browser.

d3-celestial / Olaf Frohn (BSD 3-Clause) · Bright star catalogue · Sidereal time · Constellation stories · Tanabata

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