Most scientists believe that the shape of the universe is flat (the earth will rub their hands).
Recent measurements indicate that the universe is flat with an error margin of about 2%.
There are other options. It is flat like a piece of paper, closed like a coccidia, or opened like a saddle. The general theory of relativity allows the universe to adopt any of these three forms under the action of the space curve. However, the current scientific consensus is dedicated to flat geometric shapes, such as unrestricted thin slices.
How to know the shape of the universe
related 68% of the universe is dark energy 27% is dark matter. The rest are normal matter, planets, stars, and other objects that live in the universe.
Option 1. Like a ball. If the density of the entire collection is so great that the gravitational force exceeds the expansion, the universe will be spherical. This model of the universe is limited, but not limited. Magellan between galaxies can avoid it forever without colliding with anything.
Option two. Saddle: If the density of the universe is low and cannot stop its expansion, then space will bend in the opposite direction. This will form a saddle-shaped open universe with negative curvature.
flat.The most applauding choice: Most cosmological evidence shows that the universe is expanding in all directions without positive or negative bending. In other words, the universe is flat.
After an infinite period of time, the expansion rate will gradually approach zero.
Here, the universe is infinite and will expand forever, but the rate of expansion will gradually approach zero after an infinite time.
The key is dark energy
Physicists Christian Marinoni and Adeline Buzzi at the University of Provence in France found a new way to test Dark energy model This is completely independent of previous research. His method relies on long-distance observations of pairs of galaxies to measure the curvature of space. In their work, they incidentally proved that the universe can only be flat.
“Many cosmologists believe that determining the nature of dark energy and dark matter is the most important scientific issue in the past decade.”
Marinoni and Buzzi set out to calculate the content of the universe by measuring its shape, that is, how much mass and energy it has, including dark energy. “Determining the properties of dark energy and dark matter is considered by many cosmologists to be the most important scientific issue in the past decade,” wrote Alan Heavens of the University of Edinburgh in Scotland in the journal Nature.
Marinoni and Buzzi studied paired galaxies to determine the geometry of the universe, including the binary star system in the constellation Draco, located about 350 million light-years (100 million seconds) from Draco (above).
According to their observations, The mysterious power is called dark energy It seems to counteract the gravitational force, causing the universe to expand at an accelerated rate. In other words, dark energy pulls inward and outward more than gravity, so the universe expands like a piece of paper.
All other CMB measurements, such as those of the Chilean Atacama Space Telescope (ACT) and the Wilkinson Microwave Anisotropy Probe, are consistent with the flatness of our universe.
Data from other sources, especially Accent oscillating, The footprints left by the original sound waves in the galaxy after the Big Bang also showed flatness.
So, at least for now, at least for now, the universe looks like a three-dimensional blueprint. By definition, our observations are limited to the observable universe, so we may lose something.
But if the universe is curved, then it must be so huge that the 93 billion light years we can observe are not enough to show curvature.
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