Exploring the Universe: Mapping Galaxies and Dark Matter

What was the main goal of David Schllegel's project when he first arrived in Cloudcraftoft?

• To map the entire universe

• To create a map of the million brightest galaxies

• To develop a new type of telescope

• To find new planets in our solar system

What was the innovative method used in the Sloan survey to map galaxies?

• Utilizing drones for aerial mapping

• Employing satellites to capture images

• Printing images in metal and using fiber optic cables

• Using robots to measure red shifts

How did the Sloan survey contribute to our understanding of the universe?

• It revealed the random placement of galaxies

• It discovered new planets in the Milky Way

• It provided a 2D map of the universe

• It created a 3D map showing the structure of galaxies

What is the most surprising discovery about the universe according to the Sloan survey?

• Galaxies are randomly distributed

• Most of the universe is missing

• The universe is shrinking

• The universe is expanding

Why is dark matter difficult to detect?

• It moves too quickly

• It does not emit or absorb light

• It is too small to be seen

• It emits too much light

What analogy is used to describe the challenge of mapping dark matter?

• Finding a needle in a haystack

• Mapping empty spaces between street lights

• Searching for a lost city

• Exploring the depths of the ocean

What technique is used to infer the presence of dark matter?

• Measuring temperature changes

• Gravitational lensing

• Detecting sound waves

• Direct observation through telescopes

How does gravitational lensing help in mapping dark matter?

• By reflecting sound waves

• By bending light rays

• By absorbing light

• By emitting light

What role does gravity play in the detection of dark matter?

• It has no effect on dark matter

• It makes dark matter visible

• It distorts space and affects light paths

• It causes dark matter to emit light

What is the main challenge in creating a map of dark matter?

• Dark matter is too small

• Dark matter is too fast

• Dark matter is too bright

• Dark matter does not interact with light