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.

N O S E

LIVE

JEUDI 26 MARS 2026 À 22:13:04 UTC+1

Scene Notes

Real-time exploration of the sky

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

Use the mouse to move, zoom and observe the stars. The compass shows you in which direction you are looking.

The celestial vault is delimited to reveal which stars are currently visible in the sky.

Select a city to observe the sky from its position

Use the buttons to travel in time and observe how the stars move through the sky as the earth rotates.

Click on the buttons to display the shapes of the constellations as well as the azimuthal grid to find your way.

Click on the icon to take a photo and download the sky image.

Astres visible in the sky

Observing the sky allows discovering different types of celestial objects such as planets, stars, constellations, galaxies or nebulae. Their brightness varies according to their magnitude, some being easier to observe than others.
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.

Positions of celestial bodies in real time

We accurately calculate and display the apparent positions of stars 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.

Positions of the planets

Positions of the moons

Positions of the constellations and stars