In the 1990s, the physics community was shocked when astronomical measurements showed that the universe is expanding at an ever - accelerating rate. (sciencedaily.com)
This estimate takes into account the fact that the ultraviolet irradiance of the Sun was considerably larger in the distant past, as confirmed by astronomical measurements of younger Sun - like stars in the nearby galaxy. (sciencetrends.com)
This quest for «new physics» could explain the disappearance of antimatter after the Big Bang and the nature of the dark matter that, although it represents around 30 % of the universe, can only be detected by astronomical measurements at this point. (sciencedaily.com)