Distance Measurements

... big bang cannot tell us what happened before 10-43 seconds, or for that matter, what happened before zero seconds—or why the laws of physics are what they are. Until 14 billion years ago, the universe was contracting. It reached a minimum size at the Big Bang (which we call t = 0) and has been expanding ever since. ( ... Mar 6, 2018 ... Stephen Hawking knows what happened before the Big Bang ... Famed physicist Stephen Hawking definitively answered one of humankind's grandest ... Horizon takes the ultimate trip into the unknown, to explore a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before ... Apr 21, 2020 ... One of the earliest string theory notions is the "ekpyrotic" universe, which comes from the Greek word for "conflagration," or fire. In this ... Jun 9, 2021 ... How do we know? We have found the radiation left over from when the first atoms formed (the cosmic microwave background radiation) and ... Dec 16, 2024 ... Discover what scientists now think preceded the massive explosion that kickstarted the universe -- an event we call the Big Bang. Mar 31, 2020 ... by Dan Hooper. Read. Before Einstein, how the universe began was a question for theologians, not scientists. Over a century ... Apr 12, 2020 ... Cosmologist Alexander Vilenkin believes the Big Bang wasn't a one-off event, but merely one of a series of big bangs creating an endless number of bubble ... Jan 9, 2025 ... ... before. And it's this kind of science that lets us understand what's happening in LA today; the descendants of Hubble and Hansen have ...