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It is an interesting reflection on the general climate of thought before the twentieth century that no one had suggested that the universe was expanding or contracting.
...should have guessed it, as otherwise the universe would have contracted under the influence of gravity. But as the universe is expanding, this cancels out that gravitational pull. If the universe... (full context)
24 maj 2017 · The straight answer is that the universe doesn't expand into anything. There is no space "out there" for it to expand into. What the cosmic expansion does is stretch space itself,...
3 lis 2020 · They say the universe is expanding. Is that the same as saying that time is contracting? No. First, to measure time we employ means that are independent of the large scale behavior of the universe.
12 wrz 2023 · We can predict the expansion rate of the universe by observing its baby picture, the cosmic microwave background, and then employing our best model of how it grows up over time to tell us how fast the universe should be expanding today.
13 sie 2024 · Scientists used new data taken by the James Webb Space Telescope to make a new reading of the rate at which the universe is expanding over time, by measuring light from 10 galaxies including the one known as NGC 3972, above. Image via Yuval Harpaz, data via JWST.
11 mar 2024 · Riess holds a Nobel Prize for co-discovering the fact that the universe’s expansion is accelerating, due to a mysterious phenomenon now called “dark energy.” As a crosscheck, an initial Webb observation in 2023 confirmed that Hubble measurements of the expanding universe were accurate.
