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- 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 diameter of 540 sextillion (or 54 followed by 22 zeros) miles.
www.bbc.com/future/article/20210326-the-mystery-of-our-expanding-universe
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Sep 29, 2020 · The observable Universe is 93 billion light-years in diameter. Some scientists believe its true size is even scarier than that. By using the Bayesian model averaging, scientists estimated that the Universe is at least 250 times larger than the observable Universe, or at least 7 trillion light-years in diameter.
Sep 26, 2023 · Thankfully, we can see the distant universe as it was long ago because photons are massless, and they travel at 186,000 miles per second, the fastest speed there is.
Jan 13, 2023 · Key Takeaways. Here on Earth, human beings typically experience scales as small as a millimeter or as large as a few kilometers in our everyday life. But the Universe itself, even restricted to the...
- Ethan Siegel
So, how big is the observable universe? Well, it’s about 93 billion light-years in diameter. To give you an idea of what that means, a light-year is the distance light travels in one year, and light travels at a speed of 186,282 miles per second.
Mar 15, 2022 · The Big Bang. The globular cluster NGC 6397 contains around 400,000 stars and is located about 7,200 light years away in the southern constellation Ara. With an estimated age of 13.5 billion...
Aug 25, 2021 · That places a cutoff on how far you can extrapolate the hot Big Bang backwards: to a time of ~10 -35 seconds and a distance scale of ~1.5 meters. The Universe, at the earliest stages we can...
