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8th Grade Science
Space Science
17. Universe
17.2 Galaxies, Types and formation
Galaxies: Exploring Types, Structure, and Formation Across the Universe
Learners will journey through the cosmos to discover how galaxies are classified, structured, and formed from the Big Bang to the vast cosmic web that shapes our universe today.
What You'll Learn
Galaxies are classified by shape using the Hubble Sequence diagram.
Spiral, elliptical, lenticular, and irregular galaxies differ structurally.
Gravity and dark matter drive galaxy formation from primordial gas.
Galaxy mergers trigger starburst events and reshape galactic structures significantly.
What You'll Practice
1
Students identify galaxy types using structural and compositional defining features.
2
Learners apply key vocabulary including redshift, accretion, and protogalaxy.
3
Questions test understanding of galaxy formation, dark matter, and Big Bang.
Why This Matters
Understanding galaxies and their formation gives students a scientific framework for comprehending the large-scale structure, history, and future of the entire universe.
This Unit Includes
Practice exercises
Learning resources
Skills
Galaxy Classification
Dark Matter
Hubble Sequence
Galaxy Formation
Cosmic Redshift
NE Curriculum Aligned