The video discusses the first image of a black hole captured by the Event Horizon Telescope, focusing on the supermassive black hole at the center of galaxy M87. It explains the concept of relativistic beaming, the activity of the black hole, and the jets it emits. The video also addresses why the image appears fuzzy due to the black hole's small apparent size and the technological challenges in capturing it. Additionally, it compares M87's black hole with Sagittarius A* in the Milky Way, highlighting differences in size and activity. The video concludes by affirming the existence of black holes and the success of the scientific endeavor.

What phenomenon causes the plasma orbiting the black hole to appear brighter when moving towards us?

• Gravitational lensing

• Relativistic beaming

• Doppler effect

• Cosmic expansion

Why were radio waves with a wavelength of 1.3 millimeters used to capture the black hole image?

• They are less affected by gravitational forces

• They are the most powerful electromagnetic waves

• They can show features close to the event horizon and pass through interstellar dust

• They are the only waves that can penetrate the black hole

What is the reason for the fuzziness of the black hole image?

• The black hole is surrounded by too much dust

• The black hole is moving too fast

• The black hole is too small from our perspective

• The black hole is too far away

How did scientists overcome the challenge of needing a telescope the size of the Earth?

• By using a telescope on the moon

• By using a network of satellites

• By using eight telescopes spread across the globe

• By using a single large telescope in space

What is the mass of the black hole at the center of the Milky Way, Sagittarius A*?

• 6.5 billion times that of the sun

• 1 billion times that of the sun

• 4 million times that of the sun

• 10 million times that of the sun

Why might it take longer to see an image of Sagittarius A* compared to M87?

• Sagittarius A* is less active and has more variation over time

• Sagittarius A* is smaller in size

• Sagittarius A* is surrounded by more dust

• Sagittarius A* is much further away

What does the image of the black hole in M87 confirm about black holes?

• They are theoretical objects

• They are smaller than previously thought

• They do not exist

• They exist and support the general theory of relativity