Galactic Mergers and Dynamics

What surprising discovery did the Hubble Space Telescope make about galaxies?

• Galaxies often merge with other galaxies.

• Galaxies never interact with each other.

• Galaxies are moving faster than the speed of light.

• Galaxies are shrinking over time.

Which of the following is a sign that a galaxy is merging with another?

• Perfectly spherical shape

• Lack of any visible nuclei

• Presence of long tail structures

• Uniform brightness

What can the presence of two visible nuclei in a galaxy indicate?

• The galaxy is forming new stars.

• The galaxy is losing mass.

• The galaxy is in the process of merging.

• The galaxy is about to explode.

How long can the process of galaxy merging take?

• Several months

• A couple of hours

• A few days

• Millions of years

What is the future event involving the Milky Way and the Andromeda galaxy?

• They will merge in a few billion years.

• They will form a black hole.

• They will repel each other.

• They will never interact.