How to map the Universe?

The 3D map of the SDSS project is represented as a rainbow of colors, at the center of the observable Universe (the outer sphere, shows the fluctuations of the cosmic microwave background).

Anand Raichoor (EPFL), Ashley Ross (Ohio State University), SDSS

By: Caroline Lachowsky

2 min

How to map the Universe?

Why and how far?

Sidereal and astonishing answers of the astrophysicists who have just carried out the largest cartography of the Universe in 3D ...

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Let's go on a sidereal journey through time and space, to discover the largest 3D map of the Universe ever made ... A technical and human scientific feat, unveiled on July 20, 2020 by an international collaboration astrophysicists.

The result of more than 20 years of observation, this astronomical map includes 4 million galaxies and can be traced back up to 11 billion years ... The further one sees in space, the further one sees far in time. !

This map is therefore the very first to report almost the entire history of the expansion of the Universe.

What does it teach us about this expansion but also about the shape of the Universe?

And in the place of our galaxy?

How do you go about mapping the cosmos in 3D?

What clues about this mysterious dark energy which constitutes the essence of the Universe?

With

, astrophysicist at the École Polytechnique, initiator of the eBOSS project which is the fourth and last survey which made it possible to complete and constitute this map of the Universe in 3D and

astrophysicist at CEA (IRFU) - Paris Saclay University.

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