Big Bang Theory

Big Bang theory is the leading explanation for how our universe began. According to the theory, the entire universe began as a tiny singularity that went through an explosive expansion 13.8 billion years ago, gradually expanding into the cosmos we see today. Today, astronomers can detect an "echo" from the Big Bang in the cosmic microwave background, a phenomenon that can be detected with radio telescopes. Big Bang Theory is also the name of a popular CBS sitcom about scientists, where several real-life scientists and astronauts have appeared.

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Why We Need Cosmic Inflation

October 22, 2018 | Article

The "vanilla" Big Bang model, without any other additions or amendments, can't explain all the observations. Here's how it might have worked.
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Stephen Hawking's Final Book Says There's 'No Possibility' of God in Our Universe

October 18, 2018 | Article

Is there room for God in the endless, expanding universe? In his final book, Stephen Hawking says no.
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Black Holes Unlikely the Source of Universe's Missing Dark Matter

October 18, 2018 | Article

Scientists have ruled out black holes as a possible source for most of the elusive dark matter scattered throughout much of the universe.
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Bringing Dark Energy Out into the Light

October 18, 2018 | Article

We've known for about 20 years that the expansion of our universe is accelerating, but how does the dark energy that causes it work?
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Star Explosions Measure The Growing Universe In 'Ask A Spaceman'

October 04, 2018 | Article

When stars explode, they generate light that you can see across the universe, and they hold a key to measuring how the universe grows.
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Galaxies from a Long Time Ago and Far, Far Away Star in Amazing Hubble View

September 13, 2018 | Article

A remarkable new image from the Hubble Space Telescope captures a close-up view of some of the most distant galaxies in the universe.
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'Ask a Spaceman' Takes a Closer Look at the Universe's 'Baby Picture'

August 29, 2018 | Article

This week's "Ask A Spaceman" episode explores the radiation echo of the Big Bang that formed our universe. While we can't see it with our eyes, this radiation surrounds us everywhere.
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Cosmic Microwave Background: Remnant of the Big Bang

August 23, 2018 | Reference

The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began.
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'Ask a Spaceman' Travels Back in Time to Explore the Big Bang

August 22, 2018 | Article

Our baby universe comes under scrutiny in the latest episode of "Ask A Spaceman", which airs on Facebook Watch today (Aug. 22).
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'Ask a Spaceman' Series Brings Universe's Weirdest Mysteries to Facebook Watch

August 14, 2018 | Article

The astrophysicist is in: In the new Facebook Watch series "Ask a Spaceman," pro explainer (and Space.com columnist) Paul Sutter answers your questions about the strangest corners of the universe.
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