Galaxies, part 2

The video explores the vastness of galaxies, starting with their types and classifications. It delves into the discovery of quasars, revealing them as highly luminous galaxies powered by supermassive black holes. The video explains how these black holes, through accretion disks, emit immense energy, making active galaxies visible across the universe. It discusses the future collision between the Milky Way and Andromeda, forming a new galaxy. The structure of galaxy clusters and superclusters is examined, highlighting the interconnectedness of the universe. Finally, the Hubble Deep Field is introduced, showcasing the universe's immense scale and the countless galaxies within it.

What is a quasar?

• A quasi-stellar radio source

• A small galaxy

• A black hole

• A type of star

What powers active galaxies?

• Galactic winds

• Dark matter

• Supermassive black holes

• Supernova explosions

What happens when two galaxies collide?

• They may merge into a larger galaxy

• They create a black hole

• They form a new star

• They disappear

What is the local group?

• A constellation

• A cluster of stars

• A group of nearby galaxies

• A type of galaxy

What is a supercluster?

• A large star

• A massive black hole

• A group of galaxy clusters

• A type of nebula

What is the Virgo Cluster?

• A galaxy cluster near the Milky Way

• A constellation

• A group of stars

• A type of black hole

What did the Hubble Deep Field reveal?

• A supernova

• A black hole

• Thousands of galaxies

• A new planet

How many galaxies are estimated to be in the universe?

• 100 billion

• 1 million

• 100 million

• 1 billion

What is the significance of human curiosity in astronomy?

• It helps us understand the universe

• It makes us feel small

• It is insignificant

• It is a waste of time

What is the Laniakea Supercluster?

• A small galaxy

• A massive supercluster of galaxies

• A large star cluster

• A type of nebula