Exploring the Vastness of the Universe

The video explores the vastness of the Universe, starting with our cosmic address and the concept of light-years as a measure of distance. It delves into the observable universe, explaining that we can only see parts of it. The video uses a classroom-sized scale to help visualize the immense size of the Universe, from the solar system to the Milky Way and beyond. It highlights the enormous distances between stars, such as the Sun and Proxima Centauri, and concludes with the mind-boggling size of the observable Universe, emphasizing our small place within it.

What does the Universe being 'really big' imply about our understanding of it?

• It is slightly larger than our solar system.

• We can fully comprehend its size.

• Its size is beyond human comprehension.

• It is comparable to the size of Earth.

What is the cosmic address of the Crash Course Kids studio?

• Crash Course Kids studio, Toronto, Universe

• Toronto, Earth, Milky Way

• Earth, Milky Way, Universe

• Milky Way, Solar System, Earth

How many times can light travel around the Earth in one second?

• Ten times

• Seven times

• Once

• Twice

How fast does light travel in one second?

• 100,000 km

• To the Moon and back

• 300,000 km

• Around the Earth once

What unit is used to measure the vast distances in space?

• Hours

• Light-years

• Miles

• Kilometers

At what scale is the Sun compared to a classroom in the visualization?

• A grain of salt

• The size of the room

• The size of a basketball

• Invisible

How far away is Proxima Centauri, the nearest star to the Sun?

• 4.24 light-years

• 8 light-minutes

• 93 billion light-years

• 19,000 light-years

What is the second closest star to Earth after the Sun?

• Betelgeuse

• Alpha Centauri

• Sirius

• Proxima Centauri

How long would it take to travel to Proxima Centauri with the fastest object built by humans?

• 4.24 years

• 19,000 years

• 8 minutes

• 93 billion years

What does the observable Universe's size being 93 billion light-years across signify?

• It's the same as the Milky Way.

• It's unimaginably vast.

• It's relatively small.

• It's fully explored by humans.