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The Moon stabilizes Earth's obliquity. Well, almost. The tilt actually varies between 22 and 24.5 degrees - and the variation is enough to induce such environmental inconveniences as the occasional ice age. Without the Moon, it might be much worse.

The Moon stabilizes Earth's obliquity. Well, almost. The tilt actually varies between 22 and 24.5 degrees - and the variation is enough to induce such environmental inconveniences as the occasional ice age. Without the Moon, it might be much worse.

Approximate author period: c. 1943 AD · modern

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Attribution & collection notes
Author or tradition
Seth Shostak
Attribution: attributed
Country attributed
Not established
A country attribution does not establish the earliest origin.
Historical period
Approximate author period: c. 1943 AD · modern
Approximate author-period evidence for Seth Shostak: documented birth year 1943; activity date not established. Wikidata Q5762284, inspected 2026-10-08. Not a quotation composition date or independent verification of attribution. Source: https://www.wikidata.org/wiki/Q5762284 (accessed 2026-10-08).
An author lifetime, approximate period or collection date is not necessarily the date when these words were first written or spoken.
Recorded source
Contributor-provided quotation collection

Supplied reference C; CSV row 496099; supplied attribution, independently unverified

A collection's publication date can be later than the words it records.