The video explores the vast universe of galaxies, estimated to be between 100 to 200 billion in number. It explains the formation of galaxies through gravitational forces and categorizes them into three main types: spiral, elliptical, and irregular. Spiral galaxies, the most common, have distinct components like bulges, discs, and halos. Elliptical galaxies are characterized by their oval shape and older stars, while irregular galaxies lack a defined shape. The video also highlights the observation of galaxies using telescopes and recent discoveries, encouraging viewers to explore the universe.

What force holds galaxies together?

• Magnetism

• Electromagnetism

• Gravity

• Nuclear Force

Tags

NGSS.HS-PS2-4

Which type of galaxy is the most common in the universe?

• Elliptical

• Irregular

• Spiral

• Lenticular

What is the central part of a spiral galaxy called?

• Disc

• Core

• Halo

• Bulge

In a spiral galaxy, where are the youngest stars typically found?

• Disc

• Halo

• Bulge

• Core

What shape characterizes elliptical galaxies?

• Rectangular

• Oval

• Spiral

• Irregular

Which galaxy is one of the largest known elliptical galaxies?

• Andromeda

• Triangulum

• Milky Way

• IC1101

What percentage of galaxies are estimated to be irregular?

• 50%

• 25%

• 75%

• 10%

What can cause a galaxy to become irregular?

• Supernova

• All of the above

• Collisions

• Gravitational forces

Which telescope took the image of the irregular galaxy IC3583?

• James Webb

• Chandra

• Hubble

• Spitzer

Which galaxy is known as the Black Eye Galaxy?

• Black Eye

• Pinwheel

• Triangulum

• Andromeda