Planck (spacecraft)
= Planck (spacecraft)
{wiki=Planck_(spacecraft)}
Planck was a space observatory launched by the European Space Agency (ESA) in 2009. It was part of the Cosmic Vision program and was designed to study the cosmic microwave background (CMB) radiation, which is the afterglow of the Big Bang. The spacecraft aimed to map the CMB with high sensitivity and angular resolution, providing crucial insights into the early universe, its composition, and the fundamental properties of cosmology.