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Starts With A Bang!

The Universe is out there, waiting for you to discover it.

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Ethan Siegel in Starts With A Bang!

Ask Ethan: Why are maps of the cosmos always oval-shaped?

It’s difficult to project a sphere onto a…

Ethan Siegel in Starts With A Bang!

How mapping galaxies can teach us what the CMB can’t

The CMB gives us critical information about our…

Ethan Siegel in Starts With A Bang!

The CMB: the most important discovery in cosmic history

First discovered in the mid-1960s, no cosmic…

Ethan Siegel in Starts With A Bang!

After 13.8 billion years, why hasn’t the Big Bang faded away?

Although the Big Bang occurred at an…

Ethan Siegel in Starts With A Bang!

How the cosmic microwave background proves the Big Bang

In the 20th century, many options abounded as…

Ethan Siegel in Starts With A Bang!

Is a new anomaly affecting the entire Universe?

Early relics and late-time objects give incompatible…

Ethan Siegel in Starts With A Bang!

Ask Ethan: How does the CMB prove the Big Bang?

In the 20th century, many options abounded as to our…

Ethan Siegel in Starts With A Bang!

Our Universe is normal! Its biggest anomaly, the CMB cold spot, is now explained

The Universe is…

Ethan Siegel in Starts With A Bang!

Ask Ethan: How Does The CMB Reveal The Hubble Constant?

We have two ways of measuring the expansion…

Ethan Siegel in Starts With A Bang!

Ask Ethan: Will The Cosmic Microwave Background Ever Disappear?

As the Universe ages, will it…