NASA | JWST Feature - Galaxy Evolution

The video explores how observing space allows us to look back in time, as light from distant galaxies takes millions of years to reach us. The Hubble Space Telescope has provided deep views into the universe, revealing galaxies as they were billions of years ago. These early galaxies were small and grew through mergers, leading to the formation of larger galaxies and star formation. To see even further back, the James Webb Space Telescope is being developed, with advanced capabilities to observe the most distant galaxies in the infrared spectrum.

Why does looking deeper into space allow us to see further back in time?

• Because galaxies emit time signals.

• Because telescopes can manipulate time.

• Because space is a time machine.

• Because light travels at a finite speed.

What is the significance of the Hubble Ultra-Deep Field?

• It shows the future of the universe.

• It reveals galaxies as they were over 13 billion years ago.

• It captures the present state of the universe.

• It displays the closest galaxies to Earth.

How did early galaxies grow over time?

• By expanding on their own.

• By colliding and merging with other small galaxies.

• By splitting into smaller galaxies.

• By absorbing stardust.

What role did galaxy mergers play in the universe?

• They caused galaxies to shrink.

• They triggered star formation and created elements for life.

• They destroyed existing galaxies.

• They stopped the formation of new stars.

What makes the James Webb Space Telescope different from Hubble?

• It is smaller and less powerful.

• It uses infrared to see the most distant galaxies.

• It only observes nearby stars.

• It is designed to look at planets in our solar system.