Understanding Galaxies

The video explains what galaxies are, describing them as clusters of stars held together by gravity. It discusses the different types of galaxies: spiral, elliptical, and irregular, highlighting their characteristics. The Milky Way, our galaxy, is a spiral galaxy with a supermassive black hole at its center. The video also covers the future collision of the Milky Way with the Andromeda galaxy and the vastness of the universe, which contains billions of galaxies.

What primarily holds a galaxy together?

• Magnetic fields

• Dark matter

• Electromagnetic forces

• Gravity

Which type of galaxy is known for having a classic spiral shape?

• Irregular

• Barred

• Spiral

• Elliptical

What type of stars are mostly found in irregular galaxies?

• Young stars

• Binary stars

• Ancient stars

• Neutron stars

In which part of the Milky Way is our solar system located?

• In the bulge

• At the center

• In the halo

• In one of the spiral arms

What is found at the center of the Milky Way galaxy?

• A nebula

• A giant asteroid

• A massive star

• A supermassive black hole

How long would light take to travel across the Milky Way galaxy?

• 1 million years

• 105,000 years

• 500,000 years

• 10,000 years

What is expected to happen in about 4.5 billion years to the Milky Way?

• It will expand

• It will collide with the Andromeda galaxy

• It will shrink

• It will disappear

What is the likely outcome of the Milky Way's collision with Andromeda?

• No change

• Formation of a black hole

• Formation of a new galaxy

• Complete destruction

Approximately how many galaxies are estimated to be in the universe?

• 10 billion

• 50 billion

• 100 to 200 billion

• 500 billion

What does each point of light in the James Webb Space Telescope image represent?

• A comet

• A galaxy

• A planet

• A star

Tags

NGSS.5-ESS1-1