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Time
Starts With A Bang!
The Universe is out there, waiting for you to discover it.
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Time
Ethan Siegel
in
Starts With A Bang!
May 2
The better way to measure cosmic time
For some reason, when we talk about the age of stars, galaxies…
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658
5 responses
Ethan Siegel
in
Starts With A Bang!
Jan 10
How humanity’s most enduring calendar failed us all
With the invention of the leap year, the Julian…
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1.1K
6 responses
Ethan Siegel
in
Starts With A Bang!
Oct 17, 2023
Attoseconds aren’t fast enough for particle physics
2023’s Nobel Prize was awarded for studying…
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676
9 responses
Ethan Siegel
in
Starts With A Bang!
Sep 7, 2023
The physics of why the first clock in America failed
A clock, designed and built in Europe, ran…
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1.1K
19 responses
Ethan Siegel
in
Starts With A Bang!
Jul 14, 2023
Ask Ethan: Did time run slower in the early Universe?
Headlines have blared that quasar ticking…
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826
12 responses
Ethan Siegel
in
Starts With A Bang!
Jul 3, 2023
Why today really isn’t 24 hours long
As the Earth spins and wobbles on its axis and revolves elliptically around the Sun, each day…
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241
2 responses
Ethan Siegel
in
Starts With A Bang!
Jun 29, 2023
No, the laws of physics are not time-symmetric
Whether you run the clock forwards or backwards, most…
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578
11 responses
Ethan Siegel
in
Starts With A Bang!
May 11, 2023
Spacetime: is it real and physical, or just a calculational tool?
Einstein’s relativity overthrew the…
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1.4K
31 responses
Ethan Siegel
in
Starts With A Bang!
Dec 2, 2022
Ask Ethan: How do we know the Universe is 13.8 billion years old?
We confidently state that the…
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578
6 responses
Ethan Siegel
in
Starts With A Bang!
Nov 25, 2022
Ask Ethan: When do we start counting the age of the Universe?
The Universe is 13.8 billion years old…
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349
6 responses