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
Venus at Peak Brightness on the 23rd: Why a Crescent Outshines a Full Disc
On 23 September Venus reaches magnitude -4.78, its brightest of the year, while only 22 % of it is lit. The paradox resolves into a multiplication: the crescent thins, but the disc grows faster, 42 arcseconds across at 59 million kilometres. The calculation, the observing window that is melting away, and what binoculars make of the crescent.
On 14 September the Moon Wipes Venus From a Daytime Sky
On Monday 14 September around midday, a 12 % crescent Moon will pass in front of Venus, magnitude -4.75, under a Sun standing 40 degrees high. From Paris the planet vanishes at 11:26 and re-emerges at 12:34; from London the Moon rises with Venus already hidden. The disappearance itself takes a minute and a half: Venus is a disc, not a point. City-by-city times, and the method for seeing a planet in daylight.
The Andromeda Galaxy Is a Naked-Eye Object, if You Know Where to Rest Your Gaze
At 2.5 million light-years, M31 is the most distant thing the unaided eye catches without strain. It spans three degrees, six full Moons laid end to end, climbs to 82 degrees above Paris, and the moonless window runs from 5 to 17 September. The exact star-hop, and what your own sky will let through.
The sky is waiting for you.
Install SkyChart, pick your city, and let it guide you to the next show. Free to start.
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