What does it mean when they say the universe is expanding

What Does An Expanding Universe Really Mean? : 13.7: Cosmos And Culture : NPR

If the Universe Is Expanding, What Is It Expanding Into?, Latest Science News and Articles

Expansion of the universe - Wikipedia

AST 101 CH 1, 2, and S1 STUDY GUIDE Flashcards

PDF document - Laaa - Chapter VI Particle Physics and Cosmology Learning Objectives: At the end of - Studocu

Why Is The Sky Dark At Night?

PHYSICAL-SCIENCE-Q4-SLM17.pdf - Physical Science 11 Science - Grade 11 Quarter 4 - Module - 17: The Expanding Universe! Part 1 First Edition

Astronomy, Everyday Mysteries

What does it mean that the universe is expanding onto itself? - Quora

ELI5 how fast is the universe expanding : r/explainlikeimfive

Is Universe Expanding?

What does it mean to say that the universe is 'expanding' when there is nothing for it 'expand' into? - Quora