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29 Σεπ 2020 · Learn about the size, expansion, and possible end of the Universe, as well as the difference between the observable and the whole Universe. Find out why the Universe seems infinite and how our perception affects our understanding of it.
Today, the universe has expanded into an age and size that is only partially observable from Earth; while the spatial size of the entire universe is unknown, the smaller observable universe is approximately 93 billion light-years in diameter at present.
Let's start by saying the Universe is big. When we look in any direction, the furthest visible regions of the Universe are estimated to be around 46 billion light years away. That's a...
An interactive visualization of the enormous objects in our universe. See how the Earth compares to the Sun, black holes and the Milky Way.
26 Σεπ 2023 · The best current estimate is that the universe’s diameter is at least 93 billion light-years. And if cosmic inflation is correct (a long story, but a likelihood), then the visible...
28 Ιαν 2022 · How big is the universe? Based on what we can observe, the universe appears to be almost 28 billion light-years across. However, it is far larger than that.
7 Ιουν 2022 · Learn about the observable universe, the section of the universe that we can see, and how its size is estimated to be 93 billion light years in diameter. Find out how the speed of light, the age of the universe, and the cosmic expansion affect our view of the cosmos.
