This Week in Astronomy: Hidden Gravitational Waves, Dark Matter Black Holes and First Stars

Scientists are developing new ways to explore hidden aspects of the universe. One approach uses powerful superconducting magnets to detect high-frequency gravitational waves—tiny ripples in space that current detectors often miss. Another proposes finding dark matter by spotting tiny primordial black holes through their Hawking radiation as they pass through our solar system, using existing instruments like the Alpha Magnetic Spectrometer. Meanwhile, astronomers are rethinking the search for the universe’s first stars, suggesting we look in slightly "polluted" galaxies where Population III stars may still shine alongside early supernova debris, making them easier to detect.

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