Saturday, December 3, 2022


Why I suddenly feel smaller than ever


By Chuck Woodbury
I suddenly feel smaller. A lot smaller. A new “sky map” as measured by a low frequency radio telescope has revealed 300,000 previously unknown galaxies.

Our Earth, of course, is located in but one galaxy. From what I am told, it’s not a very big one.

A mission to Mars, something I can hardly wait to witness, now seems to me like a walk next door to the 7-Eleven.

Our own Milky Way seems smaller than ever to me.

An international team of more than 200 astronomers from 18 countries has published the first phase of a major new radio sky survey using the Low Frequency Array (LOFAR) telescope. The survey reveals hundreds of thousands of previously undetected galaxies, shedding new light on many research areas including the physics of black holes and how clusters of galaxies evolve.

A special issue of the scientific journal Astronomy & Astrophysics is dedicated to the first twenty-six research papers describing the survey and its first results.

Radio astronomy reveals processes in the Universe that we cannot see with optical instruments. In this first part of the sky survey, LOFAR observed a quarter of the northern hemisphere at low radio frequencies. At this point, approximately ten percent of that data is now made public. It maps three hundred thousand sources, almost all of which are galaxies in the distant Universe; their radio signals have traveled billions of light years before reaching Earth.

“Magnetic fields pervade the cosmos, and we want to understand how this happened,” explained Shane O’Sullivan at the University of Hamburg. “Measuring magnetic fields in intergalactic space can be difficult, because they are very weak. However, the unprecedented accuracy of the LOFAR measurements has allowed us to measure the effect of cosmic magnetic fields on radio waves from a giant radio galaxy that is 11 million light years in size.”

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Herbert Dinken
3 years ago

3000,000 new galaxies which contain millions of suns (just guessing on the numbers), and billions of planets! How can we be so ignorant to think we are the only “intelligent” life?

Tommy Molnar
3 years ago
Reply to  Herbert Dinken

Exactly what I’ve been saying for YEARS, Herbert. I would use the word “arrogant” in place of ignorant though.

3 years ago
Reply to  Herbert Dinken

Herbert, thank you. I’ve been saying this for 30 years based on the known universe then. And now our highly insufficient knowledge has increased that exponentially. I’d say, since we are in a young sun’s orbit, that we are among the least advanced sentient beings!

3 years ago
Reply to  Herbert Dinken

If you’ve been paying attention to the news, i’m not so sure we’re the only intelligent species. I’m still waiting to find the first.

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