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Bedtime AstronomyWelcome Bedtime Astronomy Podcast. We invite you to unwind and explore the wonders of the universe before drifting off into a peaceful slumber. Join us as we take you on a soothing journey through the cosmos, sharing captivating stories about stars,... Author: Synthetic Universe Language: en Genres: Astronomy, Physics, Science Contact email: Get it Feed URL: Get it iTunes ID: Get it |
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This Week in Astronomy: Simulating the Universe’s First Light, Through Cosmic Lenses and Ancient Water
Episode 224
Wednesday, 18 June, 2025
In this week, we'll be covering:Simulating the Universe’s First Light with SKA-Low Scientists created an advanced simulation of what the SKA-Low radio telescope will detect when it starts observing the early universe. The project focuses on capturing ultra-faint 21-cm hydrogen signals from the Cosmic Dawn and the Epoch of Reionization—eras when the first stars and galaxies lit up the cosmos after a long dark age. This simulation includes realistic foreground interference, technical noise, and cosmic signals, helping researchers refine data analysis techniques before SKA-Low becomes operational. The goal is to study the universe’s first light with unmatched detail. Through Cosmic Lenses: Unlocking the Universe with Light and Gravity Researchers are using a technique called multi-messenger gravitational lensing, which combines gravitational waves and electromagnetic signals bent by massive cosmic structures, to observe distant cosmic events from multiple perspectives. This emerging field helps answer big questions about dark matter, gravity, and the expansion of the universe. International collaborations and new instruments like the Vera C. Rubin Observatory and the LIGO-Virgo-KAGRA network are central to this effort, aiming for major breakthroughs in the coming decade.Ancient Water Ice Found Around Young Star Suggests Pre-Solar Origins Astronomers have detected semi-heavy water ice (with deuterium) around a young star similar to the early Sun, thanks to the James Webb Space Telescope. This finding supports the theory that much of the water in our solar system formed in cold, dark interstellar clouds long before the Sun existed. The deuteration ratio in this system is close to that found in comets and Earth’s oceans, hinting at a common origin. Ongoing research will study more young stars to trace the cosmic journey of water across space and time.
