'she was born under a lucky star' vs 'she was born under a lucky moon'

[Lucky Strike]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #57 "Lucky You", question 7

She always seems to come out of any crisis unharmed and I'm convinced she was born under a lucky ..........

(a) planet
(b) asteroid
(c) moon
(d) star

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #57 "Lucky You", answer 7

She always seems to come out of any crisis unharmed and I'm convinced she was born under a lucky star.

Correct answer: (d) star
_________________________

moon?

Lucky Strike

[Mister Micawber]

.
No, the idiom is 'born under a lucky star'.
.
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Native English teacher at Mister Micawber's