The observable universe is vast, extending about 93 billion light-years across, containing galaxies, stars, planets, and all ...

Beyond the observable universe lie “unknown unknowns”: the subject of speculation rather than direct observation. 1 The 45.7 billion light-year radius includes only light sources.

But knowing how big the observable universe is doesn't tell us everything we know about how many atoms are in it. We also need to know how much matter, or stuff, is in it.

At some point in the far-off future, the rest of the universe would become observable to us. Unfortunately, we do not live in a static universe, but one that is expanding at an estimated 73 ...

Here is a timeline of important events in the history of our observable universe, according to conventional cosmology: Space is empty, ...

NASA’s Spitzer and Hubble have discovered a new galaxy, one right on the edge of the observable Universe. It’s so young that is only 650 million years old, which is nothing in cosmological ...

Our universe is about 13.8 billion years old, and the observable bubble of that cosmos has a diameter of about 93 billion light-years across. And we all know the famous maxim from Albert Einstein’s ...

Observable universe contains two trillion galaxies, 10 times more than previously thought. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2016 / 10 / 161013111709.htm ...

If we know how big the observable Universe is, why can't we figure out how big the unobservable part is? Newsletters Games Share a News Tip. Featured. Featured. Breaking News. White House Watch.

Finally, consider the mass of a proton and a neutron (about the same), and you have everything you need to come up with a good estimate for how many particles are in the observable universe.

Astrum. The Explosion 50 Times the Combined Power of Every Star in the Observable Universe. Posted: December 4, 2024 | Last updated: March 23, 2025 ...