Planck spacecraft

The Planck spacecraft was a space telescope launched by the European Space Agency to study the universe’s earliest moments. It mapped the birth of cosmic structures by measuring the faint glow of the cosmic microwave background—radiation leftover from the Big Bang. Operating from a stable orbit around the Sun, Planck provided detailed data on the universe’s age, composition, and development. Its observations help scientists understand fundamental questions about the universe’s origins, evolution, and the nature of dark matter and dark energy, significantly advancing our knowledge of cosmology.