Expansion of the universe - Wikipedia
The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. [1] It is an intrinsic expansion, so it does not mean that the universe expands "into" anything or that space exists "outside" it.
Expanding Into What? The Universe’s Infinite Growth Explained
2 天之前 · The expansion of the universe works similarly — but with one key difference. While dough expands into the pan, the universe doesn’t expand into anything. It expands within itself. This idea can feel like a brain teaser because the universe includes everything that exists. There’s no external “pan” holding it.
James Webb Telescope Confirms the Universe Is Expanding Faster …
2024年12月13日 · But the curious thing was the rate they calculated. The universe’s expansion rate is expressed in kilometers per second per megaparsec. (A megaparsec equals 3.26 million light-years.)
Expanding universe | Description & Facts | Britannica
2024年11月27日 · Expanding universe, dynamic state of the extragalactic realm, the discovery of which transformed 20th-century cosmology. The development of general relativity and its application to cosmology, along with the detection of extragalactic redshift, led to the realization in the 1920s that all galaxies are receding.
What is Dark Energy? Inside our accelerating, expanding Universe
2024年2月5日 · Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe down. But the cosmos wouldn’t stay this way.
Our expanding universe: Age, history & other facts | Space
2022年3月15日 · When the universe was just 10 -34 of a second or so old — that is, a hundredth of a billionth of a trillionth of a trillionth of a second in age — it experienced an incredible burst of...
NASA's Webb, Hubble Telescopes Affirm Universe's Expansion …
2024年3月11日 · The puzzle, called the "Hubble Tension," is that the current rate of the expansion of the universe is faster than what astronomers expect it to be, based on the universe's initial conditions and our present understanding of the universe’s evolution.
Webb telescope's largest study of universe expansion confirms …
2024年12月9日 · "The discrepancy between the observed expansion rate of the universe and the predictions of the standard model suggests that our understanding of the universe may be incomplete," said Nobel laureate and lead author Adam Riess, a Bloomberg Distinguished Professor and professor of Physics and Astronomy at Johns Hopkins University. "With two …
Exploring the Mystery of Our Expanding Universe
2024年10月11日 · Scientists may soon uncover new insights about some of the most mysterious phenomena in our universe with the help of the newly launched Euclid mission.
Hubble Reaches New Milestone in Mystery of Universe’s Expansion …
2022年5月19日 · Completing a nearly 30-year marathon, NASA’s Hubble Space Telescope has calibrated more than 40 “milepost markers” of space and time to help scientists precisely measure the expansion rate of the universe – a quest with a plot twist.