🌌Understand the Big Bang: Not an Explosion
Reframe the Big Bang as an expansion of space itself, then ground it in Hubble's law, the cosmic microwave background, and primordial hydrogen — and finish by writing a sixty-second explanation that never uses the word 'explosion.'
Phase 1An Expansion, Not an Explosion
Meet a cosmos that has no center.
The Big Bang has no center and no edge
6 minThe Big Bang has no center and no edge
Dots on a balloon teach more than an explosion ever could
7 minDots on a balloon teach more than an explosion ever could
Every distant galaxy is running away from every other
6 minEvery distant galaxy is running away from every other
The afterglow of the Big Bang is arriving from every direction
7 minThe afterglow of the Big Bang is arriving from every direction
Phase 2Separating Real Cosmology from Pop-Sci Myths
Separate real cosmology from popular Big Bang myths.
The universe has no center — asking 'where?' is the wrong question
6 minThe universe has no center — asking 'where?' is the wrong question
Galaxies aren't flying through space — the space between them is stretching
7 minGalaxies aren't flying through space — the space between them is stretching
Some galaxies are too far to ever reach, no matter how long we wait
7 minSome galaxies are too far to ever reach, no matter how long we wait
The universe didn't start in a tiny dot — it was dense everywhere
7 minThe universe didn't start in a tiny dot — it was dense everywhere
The universe's age comes from measuring its temperature, not from guessing
6 minThe universe's age comes from measuring its temperature, not from guessing
Phase 3Anchoring the Model to Real Evidence
Connect expansion to Hubble, the CMB, and hydrogen.
A friend asks 'so what exploded?' — here's how you answer
6 minA friend asks 'so what exploded?' — here's how you answer
A news article shows the CMB's hot and cold spots — what are you looking at?
7 minA news article shows the CMB's hot and cold spots — what are you looking at?
A student shows you H/He/Li ratios and says 'so what?'
7 minA student shows you H/He/Li ratios and says 'so what?'
Someone asks 'what came before the Big Bang?' — here's the honest answer
7 minSomeone asks 'what came before the Big Bang?' — here's the honest answer
Phase 4Your Sixty-Second Big Bang
Write a sixty-second explanation without the word explosion.
Write a sixty-second Big Bang — and never say 'explosion'
8 minWrite a sixty-second Big Bang — and never say 'explosion'
Frequently asked questions
- Why isn't the Big Bang called an explosion?
- This is covered in the “Understand the Big Bang: Not an Explosion” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Does the Big Bang have a center?
- This is covered in the “Understand the Big Bang: Not an Explosion” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- What is the cosmic microwave background?
- This is covered in the “Understand the Big Bang: Not an Explosion” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- What came before the Big Bang?
- This is covered in the “Understand the Big Bang: Not an Explosion” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How do we know the universe is expanding?
- This is covered in the “Understand the Big Bang: Not an Explosion” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
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