Expansion of the universe - Wikipedia
As the universe expands and the matter in it thins, the gravitational attraction decreases (since it is proportional to the density), while the cosmological repulsion increases. Thus, the ultimate fate of the ΛCDM universe is a near-vacuum expanding at an ever-increasing rate under the influence of the cosmological constant.
How fast is the universe expanding? Galaxies provide one answer.
2021年3月8日 · Determining how rapidly the universe is expanding is key to understanding our cosmic fate, but with more precise data has come a conundrum: Estimates based on measurements within our local universe don’t agree with extrapolations from the era shortly after the Big Bang 13.8 billion years ago.
Expanding Into What? The Universe’s Infinite Growth Explained
2024年12月18日 · What is the universe expanding into if it’s already infinite? The universe expands by itself, not into any external space, with galaxies continuously moving away from the Milky Way. Initiated by the Big Bang, this expansion is accelerating due to dark energy, which comprises most of the universe's
Future of an expanding universe - Wikipedia
Current observations suggest that the expansion of the universe will continue forever. The prevailing theory is that the universe will cool as it expands, eventually becoming too cold to sustain life. For this reason, this future scenario popularly called "Heat Death" is also known as the "Big Chill" or "Big Freeze". [1][2]
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.
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 expansion...
How fast is the Universe expanding? This astronomer took
2024年12月9日 · For decades, scientists have disagreed about a fundamental question: how quickly is the Universe expanding? But this year, astronomer Wendy Freedman announced results that could help to put the...
What is the universe expanding into if it’s already infinite?
2024年12月9日 · Scientists know the universe is expanding because they can track other galaxies as they move away from ours. They define expansion using the rate that other galaxies move away from us.
ESA - Webb & Hubble confirm Universe’s expansion rate
2024年3月11日 · The rate at which the Universe is expanding, known as the Hubble constant, is one of the fundamental parameters for understanding the evolution and ultimate fate of the cosmos. However, a persistent difference, called the Hubble Tension, is seen between the value of the constant measured with a wide range of independent distance indicators and ...
How Astronomers Discovered the Universe Is Expanding
5 天之前 · The finding amounted to groundbreaking evidence that the universe is expanding. The Great Debate: How Many Galaxies? Edwin P. Hubble Papers, Huntington Library, San Marino, California/NASA.
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