Unveiling the Universe's History: New Maps and Measurements from Earth and Beyond

Scientists at Johns Hopkins University have used the Cosmology Large Angular Scale Surveyor (CLASS) telescopes to map 75% of the sky over Earth and study the polarization of the cosmic microwave background (CMB), a remnant light from the universe's early history. By filtering out interference from the Milky Way, the team aims to understand the universe's initial conditions and the evolution of matter, including the formation of stars and galaxies. Their research, published in The Astrophysical Journal, provides essential insights into the universe's history and sets a new standard for ground-based polarization measurements.