Question 1

True or false: Ryugu is a near-Earth asteroid classified as a C-type, rich in carbon and water-bearing minerals.

Accepted Answer

True. Ryugu is a C-type asteroid, meaning it's primitive and carbonaceous, containing hydrated minerals and organic compounds.

Question 2

True or false: Ryugu is the largest asteroid in the main asteroid belt between Mars and Jupiter.

Accepted Answer

False. Ryugu is only about 900 meters wide and orbits near Earth; Ceres is the largest in the main belt.

Question 3

True or false: Ryugu’s surface is covered in bright white sand, like a tropical beach.

Accepted Answer

False. Ryugu's surface is actually very dark, almost black, due to carbon-rich material, not bright white sand.

Question 4

True or false: The Hayabusa2 spacecraft fired a copper impactor into Ryugu to create an artificial crater.

Accepted Answer

True. In 2019, Hayabusa2 deployed a projectile to blast a small crater, revealing fresh subsurface material for sampling.

Question 5

True or false: Ryugu has a metallic core similar to that of Earth, making it a potential mining target.

Accepted Answer

False. Ryugu is a rubble-pile asteroid, not metallic; it's porous and composed of loose rock and dust, not a solid core.

Question 6

True or false: Samples from Ryugu contain evidence of ancient water and amino acids, key building blocks of life.

Accepted Answer

True. Analysis revealed water-bearing minerals and over 20 amino acids, suggesting Ryugu's parent body had liquid water.

Question 7

True or false: Ryugu rotates so fast that its day is shorter than an hour on Earth.

Accepted Answer

False. Ryugu’s rotation period is about 7.6 hours, much longer than an hour, though still relatively fast for its size.

Question 8

True or false: Ryugu is named after a Japanese underwater palace from folklore.

Accepted Answer

True. The name comes from the undersea palace of Ryūjin, the dragon god, from the tale of Urashima Tarō.

Ryugu Trivia Questions