Observe the sky in real time in 3D. Observe the planets of the solar system, the Sun, the Moon, the constellations and the stars. Navigate freely in the sky by clicking on the keys to move forward or backward in time, click on the buttons to display the names and shapes of the constellations. Discover the positions of the stars and display the azimuthal grid to find your way in the sky. The « screen » feature allows to take a photo of the sky and download the image.

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LUNDI 11 MAI 2026 À 14:24:51 UTC+2

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Real-time observation of the starry sky

Visualize in real time the position of visible stars in the sky.

Celestial objects

The observation of the sky allows to see different types of celestial objects such as planets, stars, constellations, galaxies or nebulae.
Some celestial objects such as the Moon, Venus and certain stars are visible to the naked eye. By contrast, deep sky observation requires the use of astronomical instruments such as telescopes.
In good conditions, it is possible to see at night with the naked eye about 3,000 stars as well as some planets.
Unlike the stars, the planets do not twinkle, which allows us to differentiate them.

Sky map - Positions of celestial objects in the sky in real time

We reproduce the sky with the 48 constellations and their stars, the planets of the solar system, the Moon, the Sun and the Milky Way.
We accurately calculate and display their apparent positions in the sky in real time, taking into account :

  • local sidereal time of the selected observation location,
  • celestial coordinates of the stars, proper motion, precession, nutation and aberration of light,
  • date and time.

The celestial vault is delimited to reveal which celestial objects are currently visible in the sky.
The compass tells you which direction you are looking, you can select another city to observe the sky from its position.
Use the buttons to travel through time and observe how celestial objects move in the sky as the earth rotates.

Positions of the planets in the sky

Positions of the moons in the sky

Positions of constellations and stars in the sky

Deep sky

The deep sky is a set of celestial objects located outside the solar system.
It includes galaxies, nebulae, star clusters and quasars.
These objects are very far from the Earth and often low in brightness.

Galaxy astrophotographie

Observation equipment

Observing the night sky is a fascinating experience that allows discovering planets, stars, galaxies and nebulae visible from Earth.
To take full advantage of these observations, it is important to have the right astronomy equipment.

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Galaxy astrophotographie