Last Updated：2025/11/19

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(astronomy) A cloud of dust surrounding the nucleus of a comet. / (optics) A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.

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coma

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Source Word

coma

IPA(Pronunciation)

/ˈkəʊmə/

Noun

(astronomy) A cloud of dust surrounding the nucleus of a comet. / (optics) A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.

Japanese Meaning

天文学: 彗星の核を取り囲む塵やガスの雲 / 光学: 理想では点状に見えるはずの像が、洋梨形にぼやけた収差（コマ収差）として現れる現象

What is this buttons?

Astronomers marveled at the comet's coma, a luminous cloud of dust that expanded as it neared the Sun.

Google Translation / DeepL Translation

天文学者たちは、彗星の核を取り巻く明るい塵の雲に驚嘆し、それが太陽に近づくにつれて拡大するのを見た。

Details

Sense（1）

(astronomy) A cloud of dust surrounding the nucleus of a comet.

Sense（2）

(optics) A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.

Sense（3）

(botany) A tuft or bunch, such as the assemblage of branches forming the head of a tree, a cluster of bracts when empty and terminating the inflorescence of a plant, or a tuft of long hairs on certain seeds.

comae

（ plural ）

Details

coma

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