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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.
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.
16 Μαΐ 2023 · Explore the history and science of the universe with this website from NASA. Learn how generations of explorers have taken us farther into the cosmos and what we still need to discover.
26 Σεπ 2023 · Learn how astronomers measure the cosmic distance scale and estimate the size of the universe. The article explains the concepts of light-years, cosmic structures, cosmic inflation and more.
The universe is a big, big place. But how big? And how do we know? Throughout history, humans have used a variety of techniques and methods to help them answ...
28 Ιαν 2022 · The observable universe is 92 billion light-years across, but the true size of the universe depends on its shape and expansion. Learn how scientists measure the universe and what factors affect its size.
