Largest map of galaxies. What does this tell us about the universe? – Today’s event

Cea mai mare hartă a galaxiilor. Ce ne spune despre Univers?

The goal is to better understand the structure of the universe, its structure, and its evolution from the Big Bang to the present day.

Current universe model

Currently we have a model of the universe – the so – called standard cosmological model – which tells us that the universe was born about 13.8 billion years after the Big Bang – this is still a very nigu phenomenon – we do not know what, how the universe was born. This model tells us what the universe would be like: about 5% of ordinary matter – stars, planets, black holes (although it is not yet clear how many), dust, and interstellar gas – about 25% of matter and 70% of dark energy.

The dark universe is the greatest mystery in physics today. Is there really dark matter and energy? If so – why are they made? Although we have some ideas about dark matter – consisting only of particles interacting with gravity and perhaps new undiscovered interactions – dark energy energy, which may accelerate the expansion of the universe – this is a total mystery.

For this reason, it is important to be able to see accurate maps of the universe – based on astronomical observations – to better understand the universe’s and structure of the universe.

DES cooperation

In collaboration with the DES (Dark Energy Survey) of over 400 scientists from 25 research institutes and universities in 7 countries – a 570 megapixel dark energy camera mounted on a 4 meter telescope was used to observe the universe. Located in Chile between 2013 and 2019, Victor M. Blanco National Science Foundation Foundation. They had 758 night measurements during this period. Preliminary analysis of data indicating the first three years of observations results in a map of 226 million galaxies, one-eighth of the globe, and 7 billion light-years away. This is the largest and most accurate map of the galaxies in the universe. A supercomputer from the National Center for Supercomputing Applications at the University of Illinois (Urban-Chicago) was used to create this map.

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What does the data tell us?

Data obtained through DES collaboration published in the Monthly Notices of the Royal Astronomical Society were used to study the details The structure of the universe. The conclusion is that the findings from the data analysis of the cosmic microwave background with the structure of the universe and the Planck satellite were also confirmed. But a more accurate analysis of the distribution of galaxies over time (that is, 7 billion light-years away from us) shows that the current universe – and therefore the nearest galaxies – will experience a few percent more congestion than previously thought. Changing the model of the universe is not yet a difference but it will have to be studied in the future.

Studies in the near future

The DES collaboration has analyzed only half of the data – the other half will be analyzed soon, and we will better understand what the distribution of matter in the universe is and whether the universe model still explains its structure well. In the coming years, DES will complete the observation of the sky in 2019 and will build a new telescope: the Rubin Observatory – these dimensions will continue to be very important for us to understand the universe we are part of.

Article by Laboratory Nacioni de Frascotti, the first researcher in the field of elementary particle physics and nuclear physics, co-authored by the Instituto Nacionale de Physic Nuclear (Rome, Italy), Scientia.Ro

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