Astronomy Chapter 12 - 12.1

Which of the following is NOT one of the largest moons in the Solar System?

Atlas (the shepherd moon near Saturn's A ring)

The four large moons of Jupiter were first discovered by:

Galileo with his early telescope

The largest satellite (moon) in the solar system is:

Ganymede

Which planet has the biggest moon relative to its own size? Not the biggest moon in terms of kilometers, but the biggest as a percentage of the size of the planet it orbits

Pluto

What do astronomers think is the origin of the many irregular moons around the outer planets (irregular meaning they are orbiting backwards and/or have eccentric orbits)?

These moons were likely formed elsewhere and captured by the giant planets

The satellite which has the thickest atmosphere (so thick that it's quite a surprise for a satellite) is:

Titan

The majority of the moons orbiting the outer (jovian) planets are:

small moons orbiting in a retrograde direction (opposite to the direction their planet turns and orbits)

Which of the jovian planets does NOT have any satellites?

you can't fool me, all the jovian planets are accompanied by satellite (Jupiter, Saturn, Uranus, Neptune)