New sky map showcases more than 4 million galaxies, stars and other objects

This video still of data shows the most detailed ever view of our radio universe as revealed by LOFAR, which built a map of 4.4 million galaxies. (Image credit: LOFAR/Frits Sweijen)

Millions of new objects have just been cataloged in a vast new sky map that will lead to more investigations about our universe's environment, the discovery team says.

A map of roughly one-quarter of the northern sky was generated using a pan-European set of telescopes called the Low Frequency Array (LOFAR). It detected objects that are, for the most part, billions of light-years away and include objects ranging from galaxies to distant stars. LOFAR scientists created an interactive animation of the huge sky map here (opens in new tab), as well as a vast database for the public (opens in new tab) to search for individual objects.

"We anticipate [the survey] will lead to many more scientific breakthroughs in the future," lead author Timothy Shimwell, a researcher at the Netherlands Institute for Radio Astronomy and Leiden University, said in a statement (opens in new tab).

Related: Epic radio images give most-detailed views of distant galaxies

Possible investigations, Shimwell added, include "examining how the largest structures in the universe grow, how black holes form and evolve, the physics governing the formation of stars in distant galaxies, and even detailing the most spectacular phases in the life of stars in our own galaxy."

Of the vast set, roughly one million of the objects were not known to astronomy before, the team said. What's more, the entire set was cataloged in radio waves, giving a unique view of many objects that were already known to science that were viewed in other wavelengths.

A healthy dose of machine learning was required to parse the roughly 8 petabytes of data; a single petabyte represents 1,000 terabytes. The team used novel data processing algorithms on high-performance computers across Europe to process all the information, which was collected across 3,500 hours of observations.

A study based on the research was published (opens in new tab) Friday (Feb. 25) in the journal Astronomy and Astrophysics.

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Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell, Ph.D., is a staff writer in the spaceflight channel since 2022. She was contributing writer for (opens in new tab) for 10 years before that, since 2012. Elizabeth's reporting includes an exclusive with Office of the Vice-President of the United States, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and (soon) a Bachelor of History from Athabasca University. Elizabeth is also a post-secondary instructor in communications and science since 2015. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: