Shortly after the Big Bang, after the CMB was released, there was a time that's tricky to observe called Cosmic Dark Ages. Clouds of hydrogen could be detected at that time using a specific frequency of radio waves, but Earth's radiation introduces too much noise. Researchers are proposing a CubeSat called Cosmo Cube that could orbit the Moon, observing when it's in the quiet radio shadow cast by the Moon. It could help detect the first structures coming together, leading to the formation of the first galaxies.
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