Galaxies and Cosmic Structures

The video explores how galaxies evolve and change shape over time, often through collisions and mergers. It discusses the future collision between the Milky Way and Andromeda galaxies and the effects of such mergers on stars and solar systems. The structure of the universe, including galaxy clusters and superclusters, is explained, along with Hubble's Law, which describes the expansion of the universe.

What is the process called when a larger galaxy absorbs a smaller one?

• Galactic fusion

• Galactic cannibalism

• Galactic absorption

• Galactic collision

What will happen to the Milky Way and Andromeda galaxies in about 4.5 billion years?

• They will drift apart

• They will collide and merge

• They will remain unchanged

• They will form a supernova

During the Milky Way and Andromeda collision, what is the likelihood of stars and planets colliding?

• Very high

• Low

• Moderate

• Impossible

Which galaxy is NOT a member of the Local Group?

• Milky Way

• Andromeda

• Triangulum

• Sombrero

What is a supercluster?

• A single large galaxy

• A type of black hole

• A group of stars

• A cluster of galaxy clusters

How are galaxies distributed in the universe?

• Randomly

• Uniformly

• Along filaments

• In a spiral pattern

What is the term for regions in the universe that are nearly empty of galaxies?

• Voids

• Superclusters

• Clusters

• Nebulae

Who discovered that galaxies are moving away from the Milky Way?

• Isaac Newton

• Galileo Galilei

• Albert Einstein

• Edwin Hubble

What does the Hubble Law relate?

• The brightness and color of galaxies

• The mass and size of galaxies

• The speed and distance of galaxies

• The age and temperature of stars

What is the approximate value of the Hubble constant?

• 90 km/s/Mpc

• 110 km/s/Mpc

• 50 km/s/Mpc

• 70 km/s/Mpc