TED-Ed: Could the Earth be swallowed by a black hole? - Fabio Pacucci

The video explores cosmic threats, focusing on black holes. It explains black holes' nature, their detection methods, and distinguishes between stellar mass and supermassive black holes. While stellar mass black holes pose minimal risk due to their size and distance, supermassive black holes, located at galactic centers, could impact Earth if galaxies collide. Despite their destructive potential, black holes are crucial in galaxy formation, contributing to the universe's structure.

What is the boundary called beyond which nothing can escape a black hole's gravitational pull?

• Event Horizon

• Singularity

• Photon Sphere

• Accretion Disk

How can we detect black holes if they do not emit light?

• By detecting their magnetic fields

• By observing their gravitational effects on nearby objects

• By listening to the sound they make

• By measuring their temperature

What is the primary difference between stellar mass black holes and supermassive black holes?

• Their speed of rotation

• Their location in the universe

• Their mass and size

• Their color

What could potentially happen if our galaxy collides with another galaxy?

• The Earth would move to another galaxy

• The Earth could be thrown towards the galactic center

• The Earth would become a black hole

• The Earth would stop rotating

What positive role have black holes played in the universe?

• They have created new stars

• They have slowed down the expansion of the universe

• They have increased the universe's temperature

• They have contributed to the formation of galaxies