The Cerro Tololo Inter-American Observatory is the heart of the Dark Energy Survey projects. Now, the scientific team has published its second catalog of data which includes nearly 700 million mapped astronomical objects. Credit: Fermilab

Scientists Map Nearly 700 Million Previously Unknown Objects In The Universe

One of the largest public astronomical catalogs to date.


Around 700 million astronomical objects have been carefully cataloged in a new public database called the Dark Energy Survey, created by researchers at the Australian National University (ANU). It is one of the largest astronomical catalogs in the world, according to a press release from the Australian National University itself.

Data collection activities began in 2013 thanks to an advanced astronomical camera mounted on a four-meter telescope in northern Chile. Then other data were collected thanks to the Anglo-Australian Telescope in Australia, with the help of which, in particular, the distances to many objects were measured.


As the team of scientists explains it, this is a collection of data that will prove useful in further understanding the expansion of the universe and its large-scale structure as a whole.

In addition, the same data may prove useful for a more detailed and more effective study of the so-called dark energy, which is believed to be behind the expansion of the universe itself. Further releases of data from the same survey will proceed in a similar manner in the near future.

700 Million Previously Unknown Objects in the Universe

The Dark Energy Survey is currently one of the largest-scaled programs for space exploration and includes more than 400 scientists from around the world. Such research is impossible for the majority of small/individual organizations but the Dark Energy Survey is funded by dozens of institutions worldwide.

For six years, the team has been photographing approximately 1/8 of the entire sky, resulting in the discovery and mapping of nearly 700 million new celestial objects. Some of the objects included in the catalog date back to the beginning of time, that is, shortly after the Big Bang. 


You can imagine the efforts and dedication in those six years of taking images and mapping unknown celestial objects but it would likely take years before the collected data is processed and studied completely.

This new catalog could become the foundation of countless future discoveries and as far as we know, the astronomical data will be accessible to anyone around the world.

What it means

This means that even scientists who have no part in the original survey or any research program could access it and study celestial objects of interest.

As for the Dark Energy Survey research team, they will likely focus the study of matter in the search for answers that could explain the expansion of the universe from the earliest stages after the Big Bang.

This year could be massive for astronomy as 2020 was truly fruitful in astronomical discoveries and questions that need an answer. With two massive launches scheduled for 2021, the Vera Rubin observatory in Chile and the James Webb Space Telescope which should be in space by October, astronomers will get the chance to push the borders of unknown space further and further.

Especially when speaking of the Vera Rubin Observatory, the instrument, located at El Peñon Peak in northern Chile, will map the Milky Way, catch novae and supernovae, explore asteroids and look for traces of dark matter and dark energy – the invisible 95 percent of our universe. Now, with the existence of the new Dark Energy Survey catalog, it has a strong base for its future research.


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Argonne National Laboratory.
Catalogue of the sky glimpses 700 million astronomical objects.
Dark Energy Survey Makes Public Catalog of Nearly 700 Million Astronomical Objects. (2021, January 15).
Project maps “astronomical” number of celestial objects. (2021, January 14).

Written by Vladislav Tchakarov

Hello, my name is Vladislav and I am glad to have you here on Curiosmos. As a history student, I have a strong passion for history and science, and the opportunity to research and write in this field on a daily basis is a dream come true.

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