What's special about the Event Horizon Telescope that imaged the M87* black hole?

The video discusses the imaging of the M87 black hole, comparing it to Sagittarius A* in our galaxy. It explains how black holes are measured by their event horizons and why the Event Horizon Telescope is more effective than Hubble for this purpose. The video also covers the challenges of observing black holes due to their lack of light emission and the importance of using various wavelengths. Finally, it explains why M87 star was chosen for imaging over Sagittarius A* due to its larger size and higher activity.

What is the estimated mass of the black hole at the center of M87?

• 40 billion Suns

• 400 million Suns

• 4 billion Suns

• 4 million Suns

What is the approximate distance of M87 from Earth?

• 5 million light years

• 55 million light years

• 500 million light years

• 5 billion light years

Why is the Hubble Telescope not ideal for imaging black holes?

• It can only see in radio wavelengths

• It is too small to capture distant objects

• It primarily observes in visible light, which is blocked by gas and dust

• It is not powerful enough to detect black holes

What is the role of the accretion disk in observing black holes?

• It blocks the view of the black hole

• It emits visible light that can be easily observed

• It is the source of gravitational waves

• It contains bright material that can be detected

What is the main advantage of the Event Horizon Telescope over Hubble?

• It can detect gravitational waves

• It is located in space, avoiding atmospheric interference

• It has a larger aperture due to its global array

• It can observe in visible light

How does the Event Horizon Telescope achieve a high angular resolution?

• By being located on the Moon

• By combining data from multiple radio telescopes around the world

• By using a single large telescope

• By using infrared wavelengths

Why was M87* chosen for imaging over Sagittarius A*?

• Sagittarius A* is located in another galaxy

• M87* is closer to Earth

• M87* is more active and larger, making it easier to observe

• Sagittarius A* is too small to image