Astronomers discovered a mysterious feature in the Afiucus Galaxy cluster, initially unexplained. Two teams investigated using X-ray and radio data, revealing it as a massive black hole outburst, the largest ever detected. This discovery highlights scientific collaboration. Additionally, a mini moon orbiting Earth was found, illustrating the dynamic nature of celestial bodies.

What was the initial hypothesis about the mysterious feature in the Afiucus Galaxy cluster?

• A supernova

• A comet impact

• A new galaxy formation

• A large explosion

What new data did the second team use to confirm the presence of relativistic electrons?

• Optical data

• Ultraviolet data

• Radio data

• Infrared data

What was the main reason the first team ruled out a large explosion as the cause of the feature?

• Lack of X-ray emissions

• Presence of cool gas

• Absence of radio waves

• No visible light changes

Why was the explosion in the Afiucus Galaxy cluster considered unique?

• It was much larger than typical black hole outbursts

• It was the smallest explosion recorded

• It was the first explosion detected

• It occurred in a different galaxy

What does the discovery of the mini moon illustrate about the solar system?

• Planets rarely capture small objects

• Mini moons are permanent

• The solar system is static

• Small objects are constantly in motion

What is the main reason mini moons do not stay in Earth's orbit for long?

• They are made of ice

• They are too large

• The main moon's gravitational influence

• They are too far from Earth

How many natural objects, other than the moon, have been spotted orbiting Earth?

• One

• Two

• Three

• Four