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Ethan Siegel

Published in
Starts With A Bang!

Following the scientific consensus: how to be “the least wrong”

All scientific theories are limited in scope, power, and application, being mere approximations of reality. That’s why consensus is vital.

9h ago

Following the scientific consensus: how to be “the least wrong”

9h ago

Published in
Starts With A Bang!

What are all the different types of nebula in astronomy?

Some nebulae emit their own light, some reflect the light from stars around them, and some only absorb light. But that’s just the…

1d ago

What are all the different types of nebula in astronomy?

1d ago

Published in
Starts With A Bang!

How to tell which edge of a galaxy is tipped towards you

When we see spiral galaxies, some are face-on, others are edge-on, but most are tipped at an angle. But which side is closest to us?

2d ago

How to tell which edge of a galaxy is tipped towards you

2d ago

Published in
Starts With A Bang!

Starts With A Bang podcast #115 — Dwarf galaxies in isolation

The tiniest galaxies of all are the most susceptible to violence by their larger, bullying siblings. That’s why we need them in isolation.

4d ago

Starts With A Bang podcast #115 — Dwarf galaxies in isolation

4d ago

Published in
Starts With A Bang!

Ask Ethan: Why do galaxies still collide in the expanding Universe?

The Universe is expanding, and individual, bound structures are all receding away from one another. How, then, are galaxies still…

5d ago

Ask Ethan: Why do galaxies still collide in the expanding Universe?

5d ago

Published in
Starts With A Bang!

Confirmed at last: exoplanets found around nearest single star

Barnard’s star, the closest singlet star system to ours, has long been a target for planet-hunters. We’ve finally confirmed it: they exist!

6d ago

Confirmed at last: exoplanets found around nearest single star

6d ago

Published in
Starts With A Bang!

Why invest in fundamental research? A former Nazi explains

Back in 1970, sister Mary Jucunda wrote NASA, decrying large investments in science. A former Nazi’s legendary response is still relevant.

Mar 19

Why invest in fundamental research? A former Nazi explains

Mar 19

Published in
Starts With A Bang!

Scientists have definitively taken us beyond the Big Bang

Since the dawn of history, humans have pondered our ultimate cosmic origins. Now in the 21st century, science has gone beyond the Big Bang.

Mar 18

Scientists have definitively taken us beyond the Big Bang

Mar 18

Published in
Starts With A Bang!

Surprising stars reveal second-closest supermassive black hole

Just 165,000 light-years away, the Large Magellanic Cloud is suspected to house a supermassive black hole. At last, evidence has arrived.

Mar 17

Surprising stars reveal second-closest supermassive black hole

Mar 17

Published in
Starts With A Bang!

Ask Ethan: Does the multiverse explain our fundamental constants?

There are some 26 fundamental constants in nature, and their values enable our Universe to exist as it does. But where do they come from?

Mar 14

Ask Ethan: Does the multiverse explain our fundamental constants?

Mar 14

Ethan Siegel

Ethan Siegel

The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astrophysicist, science communicator & NASA columnist.

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