planeternas

Planeternas is a Swedish genitive form meaning “of the planets” and is used to indicate possession, association, or attribution to multiple planets. The form is derived from the definite plural planeterna (the planets) with the possessive suffix -s, yielding planeternas.

In Swedish, planeternas functions as a genitive determiner that appears before another noun within a noun phrase. It does not stand alone as a noun. The possessed noun is inflected in its own right and the planeternas phrase simply modifies it, for example: planeternas atmosfärer (the atmospheres of the planets) or planeternas månar (the moons of the planets). The possessive marker remains fixed while the possessed noun governs its own number and case.

Common usage occurs in scholarly and descriptive texts within astronomy, planetary science, and geography, where relations involving more than one planet are discussed. Planeternas is typically placed before the noun it modifies, forming phrases that specify a property or aspect shared by the planets as a group.

Related forms include planetens (the planet’s) for the singular possessive, and planeterna (the planets) as the definite plural noun. Understanding planeternas helps in reading Swedish scientific writing that describes characteristics, processes, or features associated with multiple planets rather than a single one. See also planeter, planeterna, and other possessive constructions in Swedish grammar.