Kirkwood gaps

American  

plural noun

Kirkwood gap singular

1. the areas in the asteroid belt which few asteroids' orbits enter, possibly due to the gravitational effects of Jupiter.

---

Kirkwood gaps Scientific  

/ kûrk′wd /

1. Specific regions in the asteroid belt where few asteroids are found. The Kirkwood gaps are believed to have formed as a consequence of gravitational interactions of asteroids with Jupiter, which resulted in the movement of the asteroids from within this area into another orbit, leaving the area sparsely populated. The Kirkwood gaps are named after the American astronomer Daniel Kirkwood (1814–1895), who first observed them in 1866.

---