Possible models of the expanding Universe | ESA/Hubble
1999年5月25日 · Several models were created up today which shall explain the past and the future expansion: A decelerating universe reaches its current size in the least amount of time. The universe could eventually contract and collapse into a "big crunch" or expand indefinetly.
Expansion of the universe - Wikipedia
The expansion of the universe is often illustrated with conceptual models where an expanding object is taken to represent expanding space. These models can be misleading to the extent that they give the false impression that expanding space must carry objects with it.
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.
29.2: A Model of the Universe - Physics LibreTexts
2022年4月11日 · The Expanding Universe. Every model of the universe must include the expansion we observe. Another key element of the models is that the cosmological principle (which we discussed in The Evolution and Distribution of Galaxies) is valid: on the large scale, the universe at any given time is the same everywhere (homogeneous and isotropic).
Our expanding universe: Age, history & other facts | Space
2022年3月15日 · Since the universe by its definition encompasses all of space and time as we know it, NASA says it is beyond the model of the Big Bang to say what the universe is expanding into or what...
Model the Expanding Universe – Science Lesson | NASA JPL …
2024年10月11日 · There are two complementary space missions seeking to explore the mysteries of dark energy, dark matter, and the accelerating expansion of the universe. The Euclid mission, a European Space Agency (ESA) space telescope with important contributions from NASA, is designed to study the expansion of the universe.
Model of ever-expanding universe confirmed by dark energy …
2024年4月4日 · Researchers in the late 1990s were expecting to find a universe slowing down from the constant pull of gravity from visible matter as well as unseen cold, dark matter (CDM). Instead, they found evidence that the expansion of the universe was accelerating.
Huge if true – dark energy doesn’t exist, claims new study on …
3 天之前 · It describes a universe where a dark energy – denoted with Λ, the Greek letter Lambda – is the driving mechanism behind the universe’s accelerating expansion. Under this model, galaxies are ...
A model of the universe explains its accelerated expansion …
2023年3月14日 · The accelerated expansion of the universe would not need dark energy, according to a study published today in the journal Monthly Notices of the Royal Astronomical Society: Letters.The author of the paper is Enrique Gaztañaga, a researcher from the Institute of Space Sciences (ICE-CSIC) and the Institute of Space Studies of Catalonia (IEEC — Institut d'Estudis Espacials de Catalunya).
The Expanding Universe and Hubble's Law - Physics of the Universe
Hubble showed that, in our expanding universe, every galaxy is rushing away from us with a speed which is in direct proportion to its distance, known as Hubble’s Law, so that a galaxy that is twice as far away as another is