Andromeda Arrives

≈ 18 billion years — 4.5 billion years from now · Far Future

Temperature (K): 2.4
When: ≈ 18 billion years — 4.5 billion years from now
Redshift: —
Era: Far Future
Seconds After Big Bang: 568024740000000000

What Happened

The Milky Way and Andromeda merge into a single elliptical galaxy. Almost no stars collide: galaxies are overwhelmingly empty, and only the spiral structure is destroyed.

Researchers

Vesto Slipher Edwin Hubble

Equations

Vis-Viva Equation Law of Universal Gravitation Escape Velocity

Theories

Dark Matter Newtonian Mechanics

Referenced by

equation

Escape Velocity Law of Universal Gravitation Vis-Viva Equation

researcher

Edwin Hubble Vesto Slipher

theory

Dark Matter Newtonian Mechanics

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From the Cosmic Timeline database in Notion, last edited 2026-08-16. This page is the row, rendered by the build; nothing on it is written by hand.