Universum.
A sky to share.

Books to learn, catalogues to explore and tools to move from curiosity to observation.

This independent, non-commercial project makes astronomy accessible to curious minds, families and enthusiasts. Everyone can discover the sky at their own pace, prepare an outing and understand the phenomena they observe.

Explore the sky Discover the tools The books

Free accessNo accountFrom book to fieldSources and methods cited

01 / Learn

Providing reference points.

Books and fact sheets explain instruments, celestial objects and the basics of astrophysics, with a progression designed for the general public.

02 / Explore

Changing your viewpoint.

From the sky seen at your observing location to a view of the Milky Way from above, maps and catalogues connect celestial names with positions and properties.

03 / Experiment

Preparing and understanding.

Calculators, simulations and observing tools let you change parameters, compare results and keep a record of your discoveries.

A project open to curiosity.

QR codes in the books extend reading into the portal’s resources. The log stores observations in the browser and can export them. Simulations are educational tools: uncertainties and schematic representations are explained on the relevant pages.

The portal is created with the help of artificial intelligence, under Steve Cimolino’s direction. Scientific resources, their authors and reuse conditions are listed on the credits page.

Meet the author Sources and credits Suggest an idea or correction

Éditions Les Vieux Livres