The video explores three major mysteries of the Milky Way: its spiral shape, the unusual movements of its stars, and the origins of high-velocity gas clouds. Scientists are investigating the role of filaments in star formation, the rippling waves of stars possibly caused by past collisions, and the origins of high-velocity clouds, which may be remnants of ancient galactic interactions or supernovae. These mysteries highlight the complexity and dynamic nature of our galaxy.

What is the interstellar medium (ISM) primarily composed of?

• Black holes

• Gas and dust

• Stars and planets

• Dark matter

What is the term used to describe the study of waves in the Milky Way?

• Galactoseismology

• Astroseismology

• Cosmology

• Astrophysics

Which of the following is a possible cause of the Milky Way's star ripples?

• A supernova explosion

• A collision with a satellite galaxy

• The formation of a new star

• The presence of a black hole

What characteristic is often observed in high-velocity clouds?

• High metallicity

• Low metallicity

• Low density

• High temperature

Which hypothesis suggests that high-velocity clouds are remnants of the Milky Way's formation?

• Dark matter interaction

• Satellite galaxy collision

• Supernova explosion

• Jan Oort's hypothesis