Exciting Discoveries on Jupiter's Largest Moon

Ganymede, Jupiter's largest moon, is unique with its vast water ocean and magnetic field. Despite its potential for life, the thin oxygen atmosphere and deep ocean pressure make it unlikely. Ganymede's magnetic field, discovered in 1996, is a mystery as it shouldn't exist given its size and composition. Tidal heating from its eccentric orbit and gravitational interactions with other moons may keep its core liquid, explaining the magnetic field. Future missions like the Juice spacecraft aim to uncover more about Ganymede's mysteries.

Which moon is the largest among Jupiter's Galilean moons?

• Io

• Ganymede

• Callisto

• Europa

What is the primary reason for Ganymede's lower density compared to Mercury?

• Abundance of water

• High metal content

• Smaller size

• Presence of a thick atmosphere

Why is life considered unlikely on Ganymede despite its water content?

• Presence of toxic gases

• High surface temperature

• Thin oxygen atmosphere

• Lack of sunlight

What is the estimated depth of Ganymede's ocean compared to Earth's deepest ocean point?

• Twice as deep

• Five times as deep

• Ten times as deep

• Same depth

What surprising feature does Ganymede possess that is unique among moons in the solar system?

• A ring system

• Volcanic activity

• A magnetic field

• A thick atmosphere

What phenomenon might explain the presence of a magnetic field on Ganymede?

• Volcanic eruptions

• Tidal heating

• Solar winds

• Atmospheric pressure

What is the Laplace resonance involving Ganymede?

• A magnetic resonance with Earth's field

• A gravitational interaction with Jupiter

• A resonance with Saturn's rings

• An orbital resonance with Europa and Io

What is the significance of the auroras detected on Ganymede?

• They show the presence of life

• They are evidence of a magnetic field

• They suggest a thick atmosphere

• They indicate volcanic activity

What is the main goal of the JUICE mission concerning Ganymede?

• To study its atmosphere

• To explore its magnetic field

• To investigate its subsurface oceans

• To measure its surface temperature

What is the primary reason scientists are interested in Ganymede's subsurface ocean?

• Possibility of extraterrestrial life

• Potential for mining resources

• Presence of rare gases

• Unique chemical composition