What is a galaxy?

• A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

• A small part of the Milky Way Galaxy.

• A supermassive black hole in the middle of the Milky Way.

• A planet called Earth.

What shape is the Milky Way galaxy?

• Spiral-shaped with curved arms like a pinwheel.

• Smooth and oval-shaped.

• Irregular shape like a blob.

• A small patch of space.

How many galaxies did the Hubble Space Telescope find in a small patch of space?

• 10,000 galaxies.

• One hundred billion galaxies.

• Thousands of galaxies.

• A few hundred galaxies.

What will happen to the Milky Way galaxy in about five billion years?

• It will bump into the Andromeda galaxy.

• It will become an elliptical galaxy.

• It will disappear into a black hole.

• It will stop having stars.

What type of galaxies are not spiral or oval-shaped?

• Irregular galaxies that look like blobs.

• Elliptical galaxies.

• Spiral galaxies.

• Galaxies with supermassive black holes.