When galaxies collide

Chapter 1

The cosmic roadmap

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Chapter 2

The physics of a smash-up

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Chapter 3

The birth of Milkomeda

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Chapter 4

Collisions across the cosmic web

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YOUR GOAL

Master of When galaxies collide

Ch 4 · Collisions across the cosmic web

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teacher The invisible cosmic web highways

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Fun Fact

Dark matter dominance: Dark matter makes up about 85% of all matter in the universe, driving the gravity of galactic collisions.

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teacher Understanding galactic cannibalism

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Glossary

cosmic web (noun)
The large-scale structure of the universe, consisting of interconnected filaments of gas and dark matter. The Milky Way and Andromeda travel along these filaments toward a massive merger in four billion years.

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Quiz

What invisible substance makes up most of the matter guiding galactic collisions?

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Gossip

Would you want to live in a galaxy with two suns?

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Quiz

Which nearby dwarf galaxy is currently being slowly devoured by the Milky Way?

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Quiz

What is the astronomical term for a large galaxy absorbing a much smaller satellite galaxy?

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Quiz

What is the name of the supercluster of galaxies that contains our Local Group?

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Quiz

What will eventually happen to all the galaxies in our Local Group?

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Quiz

Why doesn't the expansion of the universe pull Andromeda and the Milky Way apart?

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Quiz

What is the name of the enormous cosmic structure of gas and dark matter that connects all galaxies?

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Quiz

Which famous pair of colliding galaxies serves as a real-time preview of our future?

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