AST 112 - Chapter 28 (part 1) - Week 7

What is the significance of observing the faintest red smudges in deep space images?

They are the most distant galaxies, seen in their infancy

Approximately how long does it take for light from our Sun to reach Earth?

8 minutes

What is the significance of observing galaxies at different distances?

It allows astronomers to understand the process of galaxy evolution by observing galaxies at various stages of age

What is the estimated total number of galaxies in our observable universe?

100 billion

What does the term “deep” refer to when discussing images of the universe?

How faint an object is that we can see in the image

What is likely to trigger a Starburst, and the formation of new stars?

The interaction and collision of galaxies

What are common features observed through telescopes in Galaxy Mergers?

Tidal tails and stellar streams

What typically happens to galaxies after they merge based on galaxy simulations?

They become redder and older looking as they settle down

Galactic cannibalism refers to a condition where…

A larger galaxy absorbs a much smaller galaxy

What is the result of Galaxy Mergers on the accretion disk around the central black hole of a galaxy?

It feeds new material onto the accretion disk, potentially altering jet emissions

What analogy is used to describe the distribution of galaxies in the universe?

Cities and their arrangement on Earth

What are the long strands of galaxies distributed across the Universe called?

Filaments

Where are Galaxy Clusters typically found in the Universe?

At the intersections of multiple filaments

What is the significance of the Sloan Digital Sky Survey?

It played a role in mapping real galaxies in three-dimensional space

What term is used to describe the dark regions of the Universe where almost no galaxies can be found?

Voids/cosmic voids