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2. The Scale of the Universe - Wikipedia

   en.wikipedia.org/wiki/The_Scale_of_the_Universe

   [6] [7] [8] The current version of The Scale of the Universe 2 uses Pixi.js instead of Flash, ported by Matthew Martori. [6] The Scale of the Universe was featured on NASA's Astronomy Picture of the Day on October 7, 2018. [9] In 2020, animation studio Kurzgesagt released the app Universe in a Nutshell, which took inspiration from The Scale of ...

3. Cosmological horizon - Wikipedia

   en.wikipedia.org/wiki/Cosmological_horizon

   It represents the boundary between the observable and the unobservable regions of the universe, so its distance at the present epoch defines the size of the observable universe. Due to the expansion of the universe, it is not simply the age of the universe times the speed of light, as in the Hubble horizon, but rather the speed of light ...

4. Orders of magnitude (volume) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(volume)

   Volume of the Observable Universe: 1 × 10 81: One cubic ronnametre: 7.1 × 10 81: Lower bound on the volume of the universe based on analysis of WMAP [27] 6.7 × 10 83: Lower bound on the volume of the entire universe 1 × 10 90: One cubic quettametre ~1 × 10 113: rough upper bound on the physical size of the present universe, a result of the ...

5. Great Debate (astronomy) - Wikipedia

   en.wikipedia.org/wiki/Great_Debate_(astronomy)

   Later in the 1920s, Edwin Hubble showed that Andromeda was far outside the Milky Way by measuring Cepheid variable stars, proving that Curtis was correct. [6] It is now known that the Milky Way is only one of as many as an estimated 200 billion (2 × 10 11) [7] to 2 trillion (2 × 10 12) or more galaxies in the observable Universe.

6. Universe - Wikipedia

   en.wikipedia.org/wiki/Universe

   The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.

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   Make web pages easy to read for you! With simple keyboard shortcuts, you can zoom in or out to make text larger or smaller. In an instant, these commands improve the readability of the content you're viewing. • Zoom in - Press Ctrl (CMD on a Mac) + the plus key (+) on your keyboard.