🎧 Traces of a Cosmic Dawn
Автор: National Science Foundation News
Загружено: 2025-06-19
Просмотров: 381
Traces of cosmic microwave background radiation created billions of years ago during the Big Bang can be found throughout the universe. Innovative research infrastructure allows astrophysicists to study this radiation for hidden clues about how the early universe evolved into what it is now. We’ll explore some new results looking at light from the cosmic dawn in the U.S. National Science Foundation’s “Discovery Files”.
“Fundamentally the result is a map of the night sky, but instead of the stars, we mapped invisible microwave light. This lies on the electromagnetic spectrum between radio waves and the infrared. And by analyzing this map of the sky in the microwaves, we can estimate when the first star is formed, the so-called cosmic dawn.”
Tobias Marriage is a professor at Johns Hopkins University and part of the collaboration working on the U.S. National Science Foundation Cosmology Large Angular Scale Surveyor, or CLASS telescopes. The research group has detected the fingerprints left by the first stars Big Bang light from here on earth - previously only accomplished by technology deployed in space.
The group had to develop a method to get around the technical limitations that occur on the ground - interference from broadcast radio waves, radar, and satellites as well as distortions from the Earth’s atmosphere and weather.
“With this breakthrough result, I'm excited to capitalize and expand the telescope array in the ways we know we need to, to get to our goal of really pinning down this cosmic dawn.”
To learn more about this research, listen to "NSF's Discovery Files" podcast, episode Light from Cosmic Dawn.

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