Question 1

True or false: Galileo was named after the astronomer who discovered Jupiter’s four largest moons.

Accepted Answer

False. It was named for Galileo Galilei, who discovered those moons in 1610—but the spacecraft itself was not named by him.

Question 2

True or false: The Galileo probe dropped into Jupiter’s atmosphere and survived for nearly an hour.

Accepted Answer

True. The atmospheric probe entered Jupiter in 1995, transmitting data for 58 minutes before being crushed and melted.

Question 3

True or false: Galileo’s antenna failed to fully deploy, drastically reducing data transmission rates.

Accepted Answer

True. Its main high-gain antenna jammed in 1991, forcing use of a low-gain antenna that sent data at a trickle.

Question 4

True or false: Galileo was the first spacecraft to fly by an asteroid and discover its moon.

Accepted Answer

True. Galileo flew by asteroid 243 Ida in 1993 and discovered its tiny moon Dactyl, the first known asteroid moon.

Question 5

True or false: Galileo directly sampled Europa’s subsurface ocean by crashing into the moon.

Accepted Answer

False. Galileo never crashed into Europa; it was intentionally sent into Jupiter’s atmosphere in 2003 to avoid contaminating Europa.

Question 6

True or false: Galileo took the first close-up images of a comet impact when it observed Shoemaker-Levy 9 hit Jupiter.

Accepted Answer

True. In 1994, Galileo had a direct view of the comet fragments slamming into Jupiter, capturing historic images.

Question 7

True or false: Galileo carried a plutonium power source that survived two close flybys of Earth.

Accepted Answer

True. Its radioisotope thermoelectric generators (RTGs) powered it through gravity assists at Earth in 1990 and 1992 without failure.

Question 8

True or false: Galileo discovered that Jupiter’s rings are made mostly of ice from volcanic Io.

Accepted Answer

False. Jupiter’s rings are primarily dust from micrometeorite impacts on its small moons, not from Io’s volcanoes.

Galileo spacecraft Trivia Questions