Tonight, look up — and finally know what you're seeing.
SkyChart names every object above you, finds the best window for sunrise or sunset, and alerts you before every show. Precise data, in an app made for wonder.
The whole sky, made legible.
Spot every object
Point your phone: planets, stars, constellations and satellites appear in real time, named and placed in the actual sky.
The right moment
Sunrise and sunset to the minute, blue hour, golden hour, and tonight's observing index based on your local weather.
Never miss a show
Full moons, meteor showers, conjunctions, ISS passes: one alert at the right time, for your exact location.
Find the right spot
Light pollution, hour-by-hour cloud cover, clear horizon: SkyChart tells you where to look and when to head out.
What to watch in the coming nights
Moon, planets, eclipses, meteor showers: here's what SkyChart is tracking for you in the weeks ahead.
Loved by the curious and the devoted alike
“I knew nothing about the sky. In one evening I found Venus, Lyra and spotted the ISS. It's my nightly ritual now.”
“The golden-hour window and hour-by-hour cloud cover changed how I plan every shoot.”
“The conjunction and meteor-shower alerts are frighteningly precise for my location. Essential.”
Sky guides & notebooks
Eleven Months From Now, the Longest Total Eclipse of the Century Passes Our Doorstep
On 2 August 2027 the Moon will switch the Sun off for more than six minutes at maximum, a record nothing will beat before 2114. The band of totality crosses Gibraltar, 4 min 29 s, Malaga, Cadiz and Luxor, 6 min 25 s. Seville misses it by 71 kilometres. Paris gets 51 % of the Sun covered, Marseille 73 %. Eleven months is exactly the time you need to decide where you will stand that Monday. The file opens here.
Neptune at Opposition: the Planet You Can Only Find With a Chart
On 26 September Neptune reaches opposition, 4.32 billion kilometres away: its light takes four hours to reach us. At magnitude 7.8 it is beyond the naked eye and within reach of any binoculars, provided you aim at the right spot below the Circlet of Pisces and come back two nights running. The full method, and why the exact date of opposition does not matter at all.
The Harvest Moon on the 26th: the Full Moon That Refuses to Rise Later
The full Moon of 26 September rises at 19:19 in Paris, twenty-one minutes before sunset, then only 15 or 16 minutes later on each following evening. In March the same delay reaches 84 minutes. This small geometric miracle has a name, the Harvest Moon, and an explanation that comes down to the angle of the ecliptic against the horizon. The numbers, evening by evening.
The sky is waiting for you.
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