The Biggest Stars in the Galaxy

The video explores the vastness of the Sun compared to Earth and introduces even larger stars known as supergiants and hypergiants. It highlights stars like VY Canis Majoris, NML Cygni, and UY Scuti, which dwarf the Sun in size. These stars are unstable, constantly changing in size and temperature due to various fusion reactions. The video concludes by emphasizing the insignificance of the Sun compared to these stellar giants and encourages viewers to continue exploring the universe.

How does the size of the sun compare to Earth when the solar system is scaled down?

• The sun is the size of a playground kickball, and Earth is smaller than a peppercorn.

• The sun is the size of a basketball, and Earth is a grain of sand.

• The sun is the size of a soccer ball, and Earth is a marble.

• The sun is the size of a beach ball, and Earth is a pebble.

What is a characteristic of supergiant and hypergiant stars?

• They are smaller than the sun.

• They are less luminous than the sun.

• They are in the early stages of their lives.

• They have more mass than the sun and are in the final stages of their lives.

Which star is known for being one of the largest in the Milky Way?

• VY Canis Majoris

• Betelgeuse

• Sirius

• Alpha Centauri

What causes hypergiant stars to change in size and temperature?

• The presence of nearby planets

• Different fusion reactions occurring in various layers

• Their rotation speed

• Their distance from Earth

Why might the largest known star today not be the largest tomorrow?

• Because new stars are constantly being discovered

• Due to the instability and fluctuations in size of hypergiant stars

• Because the sun is getting larger

• Due to changes in the Earth's atmosphere