How big is the Universe? Is it finite or infinite? These questions have puzzled astronomers, scientists, and curious minds ...

For centuries, we’ve looked up at the stars and wondered if the universe is infinite. We know there is a visible boundary of what we can observe, defined by how far light has traveled since the Big ...

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.

For now, our observable universe will continue to grow with the light from distant stars that can reach us, but has not had the time to reach us; one estimate says that we have only observed ...

The observable Universe contains 2 trillion galaxies today, but as time goes on, more Universe will become observable to us. Wikipedia user Pablo Carlos Budassi.

A team of scientists is proposing a bold alternative to the Big Bang theory, suggesting that our universe may have formed ...

13.8 billion years ago, the Big Bang occurred. The Universe was filled with matter, antimatter, radiation, and existed in an ultra-hot, ultra-dense, but expanding-and-cooling state.

The Universe Has Almost 10 Times More Galaxies Than We Thought : The Two-Way A new study finds there are about 2 trillion galaxies in the observable universe, up from about 200 billion. It's the ...

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.

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.