-
- There are many different types of galaxies visible in the sky.
-
- The grand design spiral, M51 (The Whirlpool Galaxy), is actually two galaxies in the process of colliding with each other.
-
- Elliptical galaxies are essentially giant balls full of stars.
-
- Some spiral galaxies have bars across the center.
-
- The Hubble Tuning Fork diagram is a useful tool for classifying galaxies.