Galaxia

The video tutorial explores galaxies, their composition, and the role of gravity in holding them together. It discusses the potential presence of black holes at galaxy centers and categorizes galaxies into spiral, elliptical, and irregular types. The tutorial also covers the distribution of galaxies in space, highlighting the Local Group and the proximity of Andromeda to the Milky Way.

What is a galaxy and what does it consist of?

How are galaxies held together?

What are the three basic types of galaxies?

Describe the characteristics of spiral galaxies.

What distinguishes elliptical galaxies from spiral galaxies?

What are irregular galaxies and what is their significance?

How long does it take for our solar system to travel around the center of the Milky Way?