Exploring the Universe with the Event Horizon Telescope

What two key components are necessary to observe distant cosmic objects?

• A powerful microscope and a telescope

• A series of radio telescopes and an accurate clock

• A satellite and a space station

• A camera and a computer

What significant astronomical event occurred on April 10, 2019?

• A solar eclipse

• The discovery of a new planet

• The launch of a new space telescope

• The first image of a black hole was captured

What does the orange ring in the black hole image represent?

• A halo of dark matter

• Photons from hot swirling gas

• A reflection of the telescope

• A ring of stars

What is the main challenge in creating an image of a black hole?

• The black hole is too bright

• The black hole is too far away

• The black hole does not emit visible light

• The black hole moves too fast

What is the main advantage of using radio waves to observe black holes?

• They are easier to detect

• Space is mostly transparent to them

• They are less affected by gravity

• They have shorter wavelengths

How does the EHT achieve a resolution better than the Hubble Space Telescope?

• By using a larger single telescope

• By observing from space

• By combining multiple radio telescopes around the world

• By using a more powerful camera

What is the role of the hydrogen maser in the EHT?

• To amplify radio signals

• To process data from telescopes

• To synchronize the clocks at different telescopes

• To capture images of black holes

What is interferometry in the context of the EHT?

• A method to amplify radio signals

• A technique to combine signals from multiple telescopes

• A way to measure the distance to stars

• A process to cool down telescopes

What is the next target for the EHT after capturing the M87* black hole?

• A black hole in the Andromeda galaxy

• The supermassive black hole at the center of our galaxy

• A newly discovered black hole

• A distant star cluster

What does the EHT's ability to capture a black hole image suggest about future astronomical discoveries?

• They will require larger telescopes

• They will reveal new mysteries

• They will focus on visible light

• They will be limited to our solar system