Amazing Space- Graphic Organizer: Galaxy types compared

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Astronomy basics > Graphic Organizer: Galaxy types compared

Graphic Organizer:

Comparison of spiral, elliptical, and irregular galaxies

Teacher PDF (126KB) As presented below

Student PDF (440KB) Pictures and blank chart

Spiral galaxies	Elliptical galaxies	Irregular galaxies

Huge; contain stars, gas, and dust	Huge; contain stars, gas, and dust	Huge; contain stars, gas, and dust
Held together by gravity	Held together by gravity	Held together by gravity
Pinwheel shape (see top view of Spiral 1, above)	Round-to-oval shape	No regular shape
Bulge and thin disk; halo is present (see side view of Spiral 2, above)	Bulge but no disk; halo is present	May show signs of a disk and/or a bulge; halo is present
Rich in gas and dust	Little cool gas and dust	Usually rich in gas and dust
Young and old stars are present	Mainly old stars are present	Young and old stars are present

Astronomy basics > Graphic Organizer: Galaxy types compared