oort cloud   (TTS Sound)

The oort_cloud has 1 Senses.

• oort cloud
• オールトの雲
• (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun
• 冥王星の軌道の外側で太陽の周りを巡っているとされる巨大な彗星群