About Us

Thanks to the results presented today, Archeops allows, with an unparalleled accuracy to confirm that the Universe is spatially flat on a very large scale. This result implies that the density of matter-energy contained in the Universe is extremely close to the critical value separating an “open” (spatially infinite) universe from a “closed” universe. Only a part (about 5%) of this density is due to ordinary matter, or baryonic matter, 25% being associated with other exotic forms of matter whose nature is still unknown; One of the consequences of these measurements is to confirm the acceleration of the expansion of the Universe which had been demonstrated by observations using type Ia supernovae as distance indicators.