Understanding the Universe's Structure
This page introduces the fundamental concepts of structure de l'univers college. The universe is organized into distinct hierarchical levels, from individual solar systems to vast galactic clusters.
Definition: A galaxy is a massive collection of stars, including our solar system, with the Milky Way being our home galaxy.
Highlight: The solar system consists of a central star theSun and eight planets orbiting in nearly circular paths.
Example: Earth completes one rotation in 24 hours and orbits the Sun in 365 days.
Vocabulary: Terrestrial planets Mercury,Venus,Earth,Mars and Gas giants Jupiter,Saturn,Uranus,Neptune