Which group of asteroids shares Jupiter's orbit at the L4 and L5 Lagrange points?

• A. Jovian Trojans
• B. Kuiper belt
• C. Asteroids
• D. Meteoroids

Answer: (A)

The idea being tested is that certain small bodies can stay put in special spots relative to a planet, called Lagrange points, where gravity and orbital motion balance. For a planet like Jupiter, the stable positions are the L4 and L5 points, located about 60 degrees ahead of and behind the planet along its orbit around the Sun. Objects in those spots share the same orbital path and period as Jupiter, effectively riding along with it. When a group of asteroids occupies those two points, we call them Jovian Trojans.

That’s why the best answer is Jovian Trojans: they are the asteroids that share Jupiter’s orbit specifically at the L4 and L5 locations, forming two stable camps ahead of and behind Jupiter. The Kuiper belt consists of icy bodies far beyond Neptune, not tied to Jupiter’s Lagrange points; meteoroids are tiny particles not organized into a co-orbital group with Jupiter; and the broad category of asteroids mostly resides in the main belt or elsewhere—not at Jupiter’s L4/L5 points.