The Universe

The Universe

From Earth to The Universe

Types of Galaxies

Galaxy

A Galaxy is a huge collection of gas and dust along with billions of stars in their solar systems. A galaxy is held together by gravity. Some scientists think there could be as many as 100 billion galaxies in the universe. Galaxies have different shapes and are classified according to Hubble Classification.

Multiple Select

What does a galaxy consist of ?

• stars

• dust

• gas

• solar systems

Multiple Choice

What is a galaxy held together by?

• solar systems

• gas

• dust

• gravity

Multiple Choice

How many galaxies could there be in the universe according to some scientists?

• 100 million

• 100 billion

• 100 thousand

• 100

Multiple Choice

How are galaxies classified?

• by solar systems

• by dust

• by shapes

• by gas

Four Main Classifications of Galaxies

• Elliptical Galaxies

• Spiral Galaxies

• Lenticular Galaxies

• Irregular Galaxies

Multiple Choice

What type of galaxies have a bright central bulge and are surrounded by an extended disk like structure?

• Lenticular Galaxies

• Spiral Galaxies

• Irregular Galaxies

• Elliptical Galaxies

Multiple Choice

What type of galaxies have arms?

• Spiral Galaxies

• Lenticular Galaxies

• Elliptical Galaxies

• Irregular Galaxies

Multiple Choice

What type of galaxies are featureless and spherical in shape?

• Irregular Galaxies

• Spiral Galaxies

• Elliptical Galaxies

• Lenticular Galaxies

Multiple Choice

What is the type of the Milky Way Galaxy?

• Regular Spiral

• Barred Spiral