How The Planck Satellite Forever Changed Our View Of The Universe
“Most importantly, a spectacular agreement to a never-before-achieved precision now exists between the CMB we observe and the theoretical predictions of a Universe with 5% normal matter, 27% dark matter, and 68% dark energy. There might be wiggle room of 1-2% in some of those numbers, but a Universe without dark matter and dark energy, both, in great abundance, is a no-go in the face of these observations. They’re real, they’re necessary, and their predictions match the full suite of data perfectly.
Inflation, neutrino physics, and the Big Bang have additional pieces confirming them, while alternatives and specific variants are better constrained. Most definitively, the Planck collaboration states, “We find no compelling evidence for extensions to the base-ΛCDM model.” At last, we can state, with extraordinary confidence, what the Universe is made of.”
For centuries, the question of what the Universe was made of was one of the most unknowable wonders of existence. This week, the Planck collaboration, whose team made the most accurate, precision measurements of the Big Bang’s leftover glow, released their final results, providing unprecedented answers to that question. We now know what the Universe is made of, how old it is, how fast it’s expanding, and a whole suite of other information about it, better than we’ve ever known before. The Planck satellite has revolutionized our view of the Universe, and we’re unlikely to ever do better using this line of inquiry.